n Locke An Essay Concerning Human Understanding Essay Concerning Human Understanding 109 6 n Locke An Essay Concerning Human Understanding John Locke (1632-1704), the great English

An Essay Concerning Human Understanding 109

6n Locke

An Essay Concerning HumanUnderstanding

John Locke (1632-1704), the great English philosopher, was also a studentof science, a practicing physician, and one of the founders of the Royal Soci-ety, the oldest scientific organization in Great Britain, As a philosopher, hecarried on the empirical tradition that was so important for the developmentof scientific method. Through his writings he did for human nature what hiscontemporary Newton did for the cosmos, and thereby became the officialphilosopher of his age. He was, however, no "closet thinker." Livingthrough the English revolutions of the seventeenth century, Locke had strongpolitical preferences and acted on them. He opposed royal absolutism andsupported the Whigs in their bid for parliamentary supremacy; for these ac-tivities, he suffered exile and the loss of his fortune. Philosophically, Lockewas an empiricist, although he was not thoroughly consistent in his views.He said he was driven to study the process of knowing because of thefruit-lessness of metaphysical discussions of absolute truth and reality. For Locke,there were no absolute principles of knowledge. All knowledge was partialand tentative, formed progressively by the use of what was given in senseperception. By his common-sense arguments, Locke freed the psychologicalprocess of knowing from the doctrine of "innate" ideas and brought it downto earth. He thus discredited abstract rationalism, which hampered scientificinvestigation, and disallowed original sin and heredity as the chief sources ofhuman behavior. This environmental psychology gave society an instrumentwith which to refashion the world; for, if people are the products of their

John Locke, An Essay Concerning Human Understanding, in The Philosophical Works ofJohn Locke, ed. J. A. St. John (London: George Bell and Sons, 1892), I, 134-37,142-47, 205-08, 210-11, 221-27, 279-80. Adapted.

environment, then by changing the environment society could remakehumankind—a basic article of faith of the Enlightenment.

In An Essay Concerning Human Understanding (1690), Locke ex-plores irrespectively the operations of the mind and tells us what knowledgeis, how it is acquired, and how valid it is. He denies the existence of innatelogical or moral principles, picturing the mind at birth as a blank tablet(tabula rasa) on which experience and reasoning write the script. Histheory, which may seem commonplace and incomplete today, was quite revo-lutionary in its time.

NO INNATE PRINCIPLES IN THE MIND

The way shown how we come by any Knowledge, sufficient to prove itnot innate.—It is an established opinion among some men, thatthere are in the understanding certain innate1 principles; some pri-mary notions,2 characters, as it were stamped upon the mind of man;which the soul receives in its very first being, and brings into theworld with it. It would be sufficient to convince unprejudicedreaders of the falseness of this supposition, if I should only show (as Ihope I shall in the following parts of this discourse) how men, barelyby the use of their natural faculties, may attain to all the knowledgethey have, without the help of any innate impressions; and may ar-rive at certainty, without any such original notions or principles. ForI imagine any one will easily grant that it would be impertinent tosuppose the ideas of colors innate in a creature to whom God hasgiven sight, and a power to receive them by the eyes from externalobjects: and no less unreasonable would it be to attribute severaltruths to the impressions of nature, and innate characters, when wemay observe in ourselves faculties fit to attain as easy and certainknowledge of them, as if they were originally imprinted on themind.

But because a man is not permitted without censure to follow hisown thoughts in the search of truth, when they lead him ever solittle out of the common road, I shall set down the reasons that mademe doubt of the truth of that opinion, as an excuse for my mistake,

1 Inborn; not acquired.2 Ideas unsupported by evidence or reason.

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if I be in one; which I leave to be considered by those who, with me,dispose themselves to embrace truth wherever they find it.

General Assent the great Argument.—There is nothing more com-monly taken for granted than that there are certain principles, bothspeculative and practical (for they speak of both), universally agreedupon by all mankind, which therefore, they argue, must needs beconstant impressions, which the souls of men receive in their first be-ings, and which they bring into the world with them, as necessarilyand really as they do any of their inherent faculties.

Universal Consent proves nothing innate.—This argument, drawnfrom universal consent, has this misfortune in it, that if it were truein matter of fact, that there were certain truths wherein all mankindagreed, it would not prove them innate, if there can be any otherway shown how men may come to that universal agreement, in thethings they do consent in, which I presume, may be done.

"What is, is," and "it is impossible for the same Thing to be and not tobe," not universally assented to,—But, which is worse, this argumentof universal consent, which is made use of to prove innate principles,seems to me a demonstration that there are none such; because thereare none to which all mankind give an universal assent. I shall beginwith the speculative, and instance in those magnified principles ofdemonstration, "whatsoever is, is," and "it is impossible for thesame thing to be and not to be"; which, of all others, I think havethe most allowed title to innate. These have so settled a reputation ofmaxims3 universally received, that it will no doubt be thoughtstrange if any one should seem to question it. But yet I take libertyto say, that these propositions are so far from having an universalassent, that there are a great part of mankind to whom they are not

so much as known.Not on the Mind naturally imprinted, because not known to Children,

Idiots, and so forth.—For, first, it is evident that all children and idiotshave not the least apprehension or thought of them. And the want ofthat is enough to destroy that universal assent which must be thenecessary concomitant4 of all innate truths: it seems to me near acontradiction to say that there are truths imprinted on the soul,which it perceives or understands not: imprinting, if it signify any-thing, being nothing else but the making certain truths to be per-ceived. For to imprint anything on the mind without the mind's

Statements generally accepted as true.4 Accompanying condition.


perceiving it, seems to me hardly intelligible. If therefore childrenand idiots have souls, have minds, with those impressions uponthem, they must unavoidably perceive them, and necessarily knowand assent to these truths; which since they do not, it is evident thatthere are no such impressions. For if they are not notions naturallyimprinted, how can they be innate? And if they are notions im-printed, how can they be unknown? To say a notion is imprinted onthe mind, and yet at the same time to say that the mind is ignorant ofit, and never yet took notice of it, is to make this impression noth-ing. No proposition can be said to be in the mind which it never yetknew, which it was never yet conscious of. ...

The Steps by which the Mind attains several Truths.—The senses atfirst let in particular ideas, and furnish the yet empty cabinet, and themind by degrees growing familiar with some of them, they arelodged in the memory, and names got to them. Afterwards, themind proceeding further, abstracts them, and by degrees learns theuse of general names. In this manner the mind comes to be furnishedwith ideas and language, the materials about which to exercise itsdiscursive faculty. And the use of reason becomes daily more visible,as these materials that give it employment increase. But though thehaving of general ideas and the use of general words and reasonusually grow together, yet I see not how this any way proves theminnate. The knowledge of some truths, I confess, is very early in themind; but in a way that shows them not to be innate. For, if we willobserve, we shall find it still to be about ideas, not innate, but ac-quired; it being about those first which are imprinted by externalthings, with which infants have earliest to do, which make the mostfrequent impressions on their senses. In ideas thus got, the mind dis-covers that" some agree and others differ, probably as soon as it hasany use of memory; as soon as it is able to retain and perceive dis-tinct ideas. But whether it be then or no, this is certain, it does solong before it has the use of words; or comes to that which we com-monly call "the use of reason." For a child knows as certainly beforeit can speak the difference between the ideas of sweet and bitter (thatis, that sweet is not bitter), as it knows afterwards (when it comes tospeak) that wormwood and sugarplums are not the same thing.

Assent to supposed innate truths depends on having dear and distinct ideasof what their terms mean, and not on their innateness.—A child knowsnot that three and four are equal to seven, till he comes to be able tocount seven, and has got the name and idea of equality; and then,

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upon explaining those words, he presently assents to, or rather per-ceives the truth of that proposition. But neither does he then readilyassent because it is an innate truth, nor was his assent wanting tillthen because he wanted the use of reason; but the truth of it appearsto him as soon as he has settled in his mind the clear and distinctideas that these names stand for. And then he knows the truth of thatproposition upon the same grounds and by the same means that heknew before that a rod and a cherry are not the same thing; and uponthe same grounds also that he may come to know afterwards "that itis impossible for the same thing to be and not to be," as shall bemore fully shown hereafter. So that the later it is before any onecomes to have those general ideas about which those maxims are; orto know the signification of those general terms that stand for them;or to put together in his mind the ideas they stand for; the later alsowill it be before he conies to assent to those maxims;—whose terms,with the ideas they stand for, being no more innate than those of acat or a weasel, he must stay till time and observation have ac-quainted him with them; and then he will be in a capacity to knowthe truth of these maxims, upon the first occasion that shall makehim put together those ideas in his mind, and observe whether theyagree or disagree, according as is expressed in those propositions.5And therefore it is that a man knows that eighteen and nineteen areequal to thirty-seven, by the same self-evidence that he knows oneand two to be equal to three: yet a child knows this not so soon asthe other; not for want of the use of reason, but because the ideas thewords eighteen, nineteen, and thirty-seven stand for, are not so soongot as those which are signified by one, two, and three.

Assenting as soon as proposed and understood, proves them not innate.—This evasion therefore of general assent when men come to the useof reason, failing as it does, and leaving no difference between thosesupposed innate and other truths that are afterwards acquired andlearned, men have endeavored to secure an universal assent to thosethey call maxims, by saying they are generally assented to as soon asproposed, and the terms they are proposed in understood; seeing allmen, even children, as soon as they hear and understand the terms,assent to these propositions, they think it is sufficient to prove theminnate. For, since men never fail after they have once understood thewords, to acknowledge them for undoubted truths, they would infer


that certainly these propositions were first lodged in the under-standing, which, without any teaching, the mind, at the very firstproposal immediately closes with and assents to, and after that neverdoubts again.

If such an Assent be a Mark of Innate, then "that one and two are equalto three, that Sweetness is not Bitterness," and a thousand the like, must beinnate.—In answer to this, I demand whether ready assent given to aproposition, upon first hearing and understanding the terms, be acertain mark of an innate principle? If it be not, such a general assentis in vain urged as a proof of them: if it be said that it is a mark of in-nate, they must then allow all such propositions to be innate whichare generally assented to as soon as heard, whereby they will findthemselves plentifully stored with innate principles. For upon thesame ground, that is, of assent at first hearing and understanding theterms, that men would have those maxims pass for innate, they mustalso admit several propositions about numbers to be innate; and thus,that one and two are equal to three, that two and two are equal tofour, and a multitude of other the like propositions in numbers, thateverybody assents to af first hearing and understanding the terms,must have a place among these innate axioms.6 Nor is this theprerogative of numbers alone, and propositions made about severalof them; but even natural philosophy, and all the other sciences, af-ford propositions which are sure to meet with assent as soon as theyare understood. That "two bodies cannot be in the same place" is atruth that nobody any more sticks at than at these maxims, that "it isimpossible for the same thing to be and not to be," that "white is notblack," that "a square is not a circle," that "bitterness is not sweet-ness." These and a million of such other propositions, as many atleast as we have distinct ideas of, every man in his wits, at first hear-ing, and knowing what the names stand for, must necessarily assentto. If these men will be true to their own rule, and have assent at firsthearing and understanding the terms to be a mark of innate, theymust allow not only as many innate propositions as men have dis-tinct ideas, but as many as men can make propositions wherein dif-ferent ideas are denied one of another. Since every propositionwherein one different idea is denied of another, will as certainly findassent at first hearing and understanding the terms as this generalone, "it is impossible for the same thing to be and not to be," or that

s Statements that are either true or false.6 Established principles universally recognized as true.

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which is the foundation of it, and is the easier understood of the two,"the same is not different"; by which account they will have legionsof innate propositions of this one sort, without mentioning anyother. But, since no proposition can be innate unless the ideas aboutwhich it is be innate, this will be to suppose all our ideas of color,sounds, tastes, figure, and so forth, innate, than which there cannotbe anything more opposite to reason and experience. Universal andready assent upon hearing and understanding the terms is, I grant, amark of self-evidence; but self-evidence, depending not on innateimpressions, but on something else (as we shall show hereafter),belongs to several propositions which nobody was yet so extrava-gant as to pretend to be innate.

OF IDEAS IN GENERAL AND THEIR ORIGIN

Idea is the Object of Thinking.—Every man being conscious to him-self that he thinks, and that which his mint! is applied about whilethinking being the ideas that are there, it is past doubt that men havein their minds several ideas,—such as are those expressed by thewords whiteness, hardness, sweetness, thinking, motion, man, ele-phant, army, drunkenness, and others. It is in the first place then tobe inquired, how he comes by them? I know it is a received doctrinethat men have native ideas, and original characters, stamped upontheir minds in their very first being. This opinion I have at large ex-amined already; and, I suppose what I have [already] said . . . willbe much more easily admitted, when I have shown where the under-standing may get all the ideas it has; and by what ways and degreesthey may come into the mind;—for which I shall appeal to everyone's own observation and experience.

All Ideas come from Sensation or Reflection.—Let us then suppose themind to be, as we say, white paper, void of all characters, withoutany ideas.—How comes it to be furnished? From where comes thatvast store which the busy and boundless fancy of man has painted onit with an almost endless variety? From where has it all the materialsof reason and knowledge? To this I answer, in one word, from expe-rience. In that all our knowledge is founded; and from that it ultima-tely derives itself. Our observation employed either, about externalsensible objects, or about the internal operations of our minds per-


ceived and reflected on by ourselves, is that which supplies our un-derstandings with all the materials of thinking. These two are thefountains of knowledge, from where all the ideas we have, or cannaturally have, do spring.

The Objects of Sensation one Source of Ideas.—First, our senses, con-versant about particular sensible objects, do convey into the mindseveral distinct perceptions of things, according to those variousways wherein those objects do affect them. And thus we come bythose ideas we have of yellow, white, heat, cold, soft, hard, bitter,sweet, and all those which we call sensible qualities; which when Isay the senses convey into the mind, I mean, they from external ob-jects convey into the mind what produces there those perceptions.This great source of most of the ideas we have, depending whollyupon our senses, and derived by them to the understanding, I callsensation.

The Operations of our Minds, the other Source of them.—Secondly, theother fountain from which experience furnishes the understandingwith ideas is, the perception of the operations of our own mindwithin us, as it is employed about the ideas it has got; which opera-tions, when the soul comes to reflect on and consider, do furnish theunderstanding with another set of ideas, which could not be hadfrom things without. And such are perception, thinking, doubting,believing, reasoning, knowing, willing, and all the different actingsof our own minds;—which we being conscious of, and observing inourselves, do from these receive into our understandings as distinctideas as we do from bodies affecting our senses. This source of ideasevery man has wholly in himself; and though it be not sense, as hav-ing nothing to do with external objects, yet it is very like it, andmight pro'perly enough be called internal sense. But as I call the othersensation, so I call this reflection, the ideas it affords being such onlyas the mind gets by reflecting on its own operations within itself. Byreflection then, in the following part of this discourse, I would beunderstood to mean that notice which the mind takes of its ownoperations, and the manner of them, by reason whereof there cometo be ideas of these operations in the understanding. These two, Isay, namely, external material things, as the objects of sensation, andthe operations of our own minds within, as the objects of reflectionare to me the only origin from where all our ideas take theirbeginnings. The term operations here I use in a large sense, as com-prehending not barely the actions of the mind about its ideas, but

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some sort of passions arising sometimes from them, such as is thesatisfaction or uneasiness arising from any thought.

All our Ideas are of the one or the other of these.—The understandingseems to me not to have the least glimmering of any ideas which itdoes not receive from one of these two. External objects furnish themind with the ideas of sensible qualities, which are all those differentperceptions they produce in us; and the mind furnishes the under-standing with ideas of its own operations.

These, when we have taken a full survey of them, and their severalmodes, combinations, and relations, we shall find to contain all ourwhole stock of ideas; and that we have nothing in our minds whichdid not come in one of these two ways. Let any one examine hisown thoughts, and thoroughly search into his understanding; andthen let him tell me, whether all the original ideas he has there, areany other than of the objects of his senses, or of the operations of hismind, considered as objects of his reflection. And how great a massof knowledge soever he imagines to be lodged there, he will, upontaking a strict view, see that he has not any idea in his mind but whatone of these two have imprinted;—though perhaps, with infinite va-riety compounded and enlarged by the understanding, as we shall seehereafter. . . .

The Soul begins to have Ideas when it begins to perceive.—To ask, atwhat time a man has first any ideas, is to ask, when he begins to per-ceive;—having ideas, and perception, being the same thing. I know itis an opinion, that the soul always thinks, and diat it has the actualperception of ideas in itself constantly, as long as it exists; and thatactual thinking is as inseparable from the soul as actual extension isfrom the body; which if true, to inquire after the beginning of aman's ideas is the same as to inquire after the beginning of his soul.For, by this account, soul and its ideas, as body and its extension,will begin to exist both at the same time. . . .

No Ideas but from Sensation and Reflection, evident, if we observe Chil-dren.—I see no reason, therefore, to believe that the soul thinks be-fore the senses have furnished it with ideas to think on; and as thoseare increased and retained, so it comes, by exercise, to improve itsfaculty of thinking in the several parts of it; as well as, afterwards, bycompounding those ideas, and reflecting on its own operations, itincreases its stock, as well as facility in remembering, imagining,reasoning, and other modes of thinking.

State of a child in the mother's womb.—He that will suffer himself to


be informed by observation and experience, and not make his ownhypothesis the rule of nature, will find few signs of a soul accus-tomed to much thinking in a newborn child, and much fewer of anyreasoning at all. And yet it is hard to imagine that the rational soulshould think so much, and not reason at all. And he that will con-sider that infants newly come into the world spend the greatest partof their time in sleep, and are seldom awake but when either hungercalls for the teat, or some pain (the most importunate of all sensa-tions), or some other violent impression on the body forces the mindto perceive and attend to it;—he, I say, who considers this, willperhaps find reason to imagine that a foetus in the mother's wombdiffers not much from the state of a vegetable, but passes the greatestpart of its time without perception or thought; doing very little butsleep in a place where it needs not seek for food, and is surroundedwith liquor,7 always equally soft, and near of the same temper;where the eyes have no light, and the ears so shut up are not verysusceptible of sounds; and where there is little or no variety, orchange of objects to move the senses.

The mind thinks in proportion to the matter it gets from experience tothink about.—Follow a child from its birth, and observe the alter-ations that time makes, and you shall find, as the mind by the sensescomes more and more to be furnished with ideas, it comes to bemore and more awake; thinks more, the more it has matter to thinkon. After some time it begins to know the objects which, being mostfamiliar with it, have made lasting impressions. Thus it comes bydegrees to know the persons it daily converses with, and distinguishesthem from strangers; which are instances and effects of its coming toretain and distinguish the ideas the senses convey to it. And so wemay observe how the mind, by degrees, improves in these; and ad-vances to the exercise of those other faculties of enlarging, com-pounding, and abstracting its ideas, and of reasoning about them,and reflecting upon all these; of which I shall have occasion to speakmore hereafter.

A man begins to have ideas when he first has sensation. What sensationis.—If it shall be demanded then, when a man begins to have anyideas, I think the true answer is,—when he first has any sensation.For, since there appear not to be any ideas in the rnind before thesenses have conveyed any in, I conceive that ideas in the under-

7Liquid (amnioric fluid).

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standing are coeval8 with sensation; which is such an impression ormotion made in some part of the body, as produces some perceptionin the understanding. It is about these impressions made on oursenses by outward objects that the mind seems first to employ itself,in such operations as we call perception, remembering, consider-ation, reasoning, and so forth.

The Origin of all our Knowledge.—In time the mind comes toreflect on its own operations about the ideas got by sensation, andthereby stores itself with a new set of ideas, which I call ideas ofreflection. These are the impressions that are made on our senses byoutward objects that are extrinsical9 to the mind; and its own opera-tions, proceeding from powers intrinsical and proper to10 itself,which, when reflected on by itself, become also objects of its con-templation—are, as I have said, the origin of all knowledge. Thusthe first capacity of human intellect is—that the mind is fitted to re-ceive the impressions made on it; either through the senses by out-ward objects, or by its own operations when it reflects on them. Thisis the first step a man makes toward the discovery of anything, andthe groundwork whereon to build all those notions which ever heshall have naturally in this world. All those sublime thoughts whichtower above the clouds, and reach as high as heaven itself, take theirrise and footing here: in all that great extent wherein the mind wan-ders, in those remote speculations it may seem to be elevated with, itstirs not one jot beyond those ideas which sense or reflection have of-fered for its contemplation.

In the Reception of simple Ideas, the Understanding is for the most partpassive.—In this part the understanding is merely passive; and whetheror not it will have these beginnings and, as it were, materials ofknowledge, is not in its own power. For the objects of our senses do,many of them, obtrude11 their particular ideas upon our mindswhether we will or not; and the operations of our minds will not letus be without, at least, some obscure notions of them. No man canbe wholly ignorant of what he does when he thinks. These simpleideas, when offered to the mind, the understanding can no more re-fuse to have, nor alter when they are imprinted, nor blot them out

8 Concurrent.9 External.10 Internal and belonging to."Thrust forward; to force (upon).


and make new ones itself, than a mirror can refuse, alter, or oblit-erate the images or ideas which the objects set before it do thereinproduce. As the bodies that surround us do diversely affect ourorgans, the mind is forced to receive the impressions; and cannotavoid the perception of those ideas that are annexed to them.

OF SIMPLE IDEAS

Uncompounded Appearances.—The better to understand the nature,manner, and extent of our knowledge, one thing is carefully to beobserved concerning the ideas we have; and that is, that some ofthem are simple and some complex.

Though the qualities that affect our senses are, in the things them-selves, so united and blended, that there is no separation, no distancebetween them; yet it is plain, the ideas they produce in the mindenter by the senses simple and unmixed. For, though the sight andtouch often take in from the same object, at the same time, differentideas;—as a man sees at once motion and color; the hand feelssoftness and warmth in the same piece of wax; yet the simple ideasthus united in the same subject are as perfectly distinct as those thatcome in by different senses. The coldness and hardness which a manfeels in a piece of ice being as distinct ideas in the mind as the smelland whiteness of a lily; or as the taste of sugar, and smell of a rose.And there is nothing can be plainer to a man than the clear and dis-tinct perception he has of those simple ideas; which, being each initself uncompounded, contains in it nothing but one uniform appear-ance, or conception in the mind, and is not distinguishable into dif-ferent ideas.

The Mind can neither make nor destroy them.—These simple ideas, thematerials of all our knowledge, are suggested and furnished to themind only by those two ways above mentioned, which are sensationand reflection. When the understanding is once stored with thesesimple ideas, it has the power to repeat, compare, and unite them,even to an almost infinite variety, and so can make at pleasure newcomplex ideas. But it is not in the power of the most exalted wit, orenlarged understanding, by any quickness or variety of thought, toinvent or frame one new simple idea in the mind, not taken in by theways before mentioned: nor can any force of the understanding de-

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stroy those that are there. The dominion of man, in this little worldof his own understanding being much the same as it is in the greatworld of visible things: wherein his power, however managed by artand skill, reaches no farther than to compound and divide the mate-rials that are made to his hand; but can do nothing toward the mak-ing the least particle of new matter, or destroying one atom of whatis already in being. The same inability will every one find in himself,who shall go about to fashion in his understanding one simple idea,not received in by his senses from external objects, or by reflectionfrom the operations of his own mind about them. I would have anyone try to fancy any taste which had never affected his palate; orframe the idea of a scent he had never smelled: and when he can dothis, I will also conclude that a blind man has ideas of colors, and adeaf man true distinct notions of sounds.

Only the qualities that affect the senses are imaginable.—This is thereason why—though we cannot believe it impossible to God to makea creature with other organs, and more ways to convey into the un-derstanding the notice of corporeal things than those five, as they areusually counted, which he has given to men—yet I think it is notpossible for any one to imagine any other qualities in bodies, how-soever constituted, whereby they can be taken notice of, besidessounds, tastes, smells, visible and tangible qualities. And had man-kind been made but with four senses, the qualities then which are theobjects of the fifth sense had been as far from our notice, imagination,and conception, as now any belonging to a sixth, seventh, or eighthsense can possibly be;—which, whether yet some other creatures, insome other parts of this vast and stupendous universe, may not have,will be a great presumption to deny. He that will not set himselfproudly at the top of all things, but will consider the immensity ofthis fabric, and the great variety that is to be found in this little andinconsiderable part of it which he has to do with, may be apt tothink that, in other mansions of it, there may be other and differentintelligent beings, of whose faculties he has as little knowledge orapprehension as a worm shut up in one drawer of a cabinet has of thesenses or understanding of a man; such variety and excellency beingsuitable to the wisdom and power of the Maker. I have here fol-lowed the common opinion of man's having but five senses; though,perhaps there may be justly counted more;—but either suppositionserves equally to my present purpose.


OF SIMPLE IDEAS OF SENSE

Division of simple Ideas.—The better to conceive the ideas we re-ceive from sensation, it may not be amiss for us to consider them, inreference to the different ways whereby they make their approachesto our minds, and make themselves perceivable by us.

First, then, There are some which come into our minds by onesense only.

Secondly, There are others that convey themselves into the mindby more senses than one.

Thirdly, Others that are had from reflection only.Fourthly, There are some that make themselves known, and are

suggested to the mind, by all the ways of sensation and reflection.We shall consider them apart under their several heads.Ideas of one Sense.—There are some ideas which have admittance

only through one sense, which is peculiarly adapted to receive them.Thus light and colors, as white, red, yellow, blue; with their severaldegrees or shades and mixtures, as green, scarlet, purple, sea-green,and the rest, come in only by the eyes. All kinds of noises, sounds,and tones, only by the ears. The several tastes and smells, by thenose and palate. And if these organs, or the nerves which are theconduits to convey them from without to their audience in thebrain,—the mind's presence-room (as I may so call it)—are any ofthem so disordered as not to perform their functions, they have nopostern12 to be admitted by; no other way to bring themselves intoview, and be perceived by the understanding.

The most considerable of those belonging to the touch, are heatand cold, and solidity: all the rest, consisting almost wholly in thesensible configuration, as smooth and rough; or else, more or lessfirm adhesion of the parts, as hard and soft, tough and brittle, areobvious enough.

OF COMPLEX IDEAS

Made by the Mind out of simple Ones.—We have hitherto consideredthose ideas, in the reception whereof the mind is only passive, which

12 Entrance.

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are those simple ones received from sensation and reflection beforementioned, whereof the mind cannot make one to itself, nor haveany idea which does not wholly consist of them. But as the mind iswholly passive in the reception of all its simple ideas, so it exerts sev-eral acts of its own, whereby out of its simple ideas, as the materialsand foundations of the rest, the others are framed. The acts of themind, wherein it exerts its power over its simple ideas, are chieflythese three: (1) Combining several simple ideas into one compoundone; and thus all complex ideas are made. (2) The second is bringingtwo ideas, whether simple or complex, together, and setting themby one another, so as to take a view of them at once, without unitingthem into one; by which way it gets all its ideas of relations. (3) Thethird is separating them from all other ideas that accompany them intheir real existence: this is called abstraction, and thus all its generalideas are made. This shows man's power, and its ways of operation,to be much the same in the material and intellectual world. For thematerials in both being such as he has no power over, either to makeor destroy, all that man can do is either to unite them together, or toset them by one another, or wholly separate them. I shall here beginwith the first of these in the consideration of complex ideas, andcome to the other two in their due places. As simple ideas are ob-served to exist in several combinations united together, so the mindhas a power to consider several of them united together as one idea;and that not only as they are united in external objects, but as itselfhas joined them together. Ideas thus made up of several simple onesput together, I call complex;—such as are beauty, gratitude, a man,an army, the universe; which, though complicated of various simpleideas, or complex ideas made up of simple ones, yet are, when themind pleases, considered each by itself, as one entire thing, and sig-nified by one name.

Made voluntarily.—In this faculty of repeating and joining togetherits ideas, the mind has great power in varying and multiplying theobjects of its thoughts, infinitely beyond what sensation or reflectionfurnished it with; but all this still confined to those simple ideaswhich it received from those two sources, and which are the ultimatematerials of all its compositions. For simple ideas are all from thingsthemselves, and of these the mind can have no more, nor other thanwhat are suggested to it. It can have no other ideas of sensible quali-ties than what come from without by the senses; nor any ideas ofother kind of operations of a thinking substance, than what it finds in


itself. But when it has once got these simple ideas, it is not confinedbarely to observation, and what offers itself from without; it can, byits own power, put together those ideas it has, and make new com-plex ones, which it never received so united.

n Locke An Essay Concerning Human Understanding Essay Concerning Human Understanding 109 6 n Locke An Essay Concerning Human Understanding John Locke (1632-1704), the great English

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