An Essay Concerning Humane Understanding by John Locke - HTML preview

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adequate, since it ought only to answer that power: and so al simple

ideas are adequate. It is true, the things producing in us these simple

ideas are but few of them denominated by us, as if they were only the

CAUSES of them; but as if those ideas were real beings IN them. For,

though fire be called painful to the touch, whereby is signified the

power of producing in us the idea of pain, yet it is denominated also

light and hot; as if light and heat were really something in the fire,

more than a power to excite these ideas in us; and therefore are called

qualities in or of the fire. But these being nothing, in truth, but

powers to excite such ideas in us, I must in that sense be understood,

when I speak of secondary qualities as being in things; or of their

ideas as being the objects that excite them in us. Such ways of

speaking, though accommodated to the vulgar notions, without which one

cannot be well understood, yet truly signify nothing but those powers

which are in things to excite certain sensations or ideas in us. Since

were there no fit organs to receive the impressions fire makes on the

sight and touch, nor a mind joined to those organs to receive the ideas

of light and heat by those impressions from the fire or sun, there would

yet be no more light or heat in the world than there would be pain

if there were no sensible creature to feel it, though the sun should

continue just as it is now, and Mount AEtna flame higher than ever it

did. Solidity and extension, and the termination of it, figure, with

motion and rest, whereof we have the ideas, would be really in the world

as they are, whether there were any sensible being to perceive them

or no: and therefore we have reason to look on those as the real

modifications of matter, and such as are the exciting causes of all our

various sensations from bodies. But this being an inquiry not belonging

to this place, I shall enter no further into it, but proceed to show

what complex ideas are adequate, and what not.

3. Modes are all adequate.

Secondly, OUR COMPLEX IDEAS OF MODES, being voluntary collections of

simple ideas, which the mind puts together, without reference to any

real archetypes, or standing patterns, existing anywhere, are and cannot

but be ADEQUATE IDEAS. Because they, not being intended for copies of

things really existing, but for archetypes made by the mind, to rank and

denominate things by, cannot want anything; they having each of them

that combination of ideas, and thereby that perfection, which the mind

intended they should: so that the mind acquiesces in them, and can find

nothing wanting. Thus, by having the idea of a figure with three sides

meeting at three angles, I have a complete idea, wherein I require

nothing else to make it perfect. That the mind is satisfied with the

perfection of this its idea is plain, in that it does not conceive that

any understanding hath, or can have, a more complete or perfect idea of

that thing it signifies by the word triangle, supposing it to exist,

than itself has, in that complex idea of three sides and three angles,

in which is contained al that is or can be essential to it, or

necessary to complete it, wherever or however it exists. But in our

IDEAS OF SUBSTANCES it is otherwise. For there, desiring to copy things

as they really do exist, and to represent to ourselves that constitution

on which all their properties depend, we perceive our ideas attain not

that perfection we intend: we find they still want something we should

be glad were in them; and so are all inadequate. But MIXED MODES and

RELATIONS, being archetypes without patterns, and so having nothing to

represent but themselves, cannot but be adequate, everything being so

to itself. He that at first put together the idea of danger perceived,

absence of disorder from fear, sedate consideration of what was justly

to be done, and executing that without disturbance, or being deterred by

the danger of it, had certainly in his mind that complex idea made up of

that combination: and intending it to be nothing else but what is, nor

to have in it any other simple ideas but what it hath, it could not also

but be an adequate idea: and laying this up in his memory, with the name

COURAGE annexed to it, to signify to others, and denominate from thence

any action he should observe to agree with it, had thereby a standard to

measure and denominate actions by, as they agreed to it. This idea, thus

made and laid up for a pattern, must necessarily be adequate, being

referred to nothing else but itself, nor made by any other original but

the good liking and wil of him that first made this combination.

4. Modes, in reference to settled Names, may be inadequate.

Indeed another coming after, and in conversation learning from him the

word COURAGE, may make an idea, to which he gives the name courage,

different from what the first author applied it to, and has in his

mind when he uses it. And in this case, if he designs that his idea in

thinking should be conformable to the other's idea, as the name he uses

in speaking is conformable in sound to his from whom he learned it, his

idea may be very wrong and inadequate: because in this case, making the

other man's idea the pattern of his idea in thinking, as the other man's

word or sound is the pattern of his in speaking, his idea is so far

defective and inadequate, as it is distant from the archetype and

pattern he refers it to, and intends to express and signify by the name

he uses for it; which name he would have to be a sign of the other man's

idea, (to which, in its proper use, it is primarily annexed,) and of his

own, as agreeing to it: to which if his own does not exactly correspond,

it is faulty and inadequate.

5. Because then means, in propriety of speech, to correspond to the

ideas in some other mind.

Therefore these complex ideas of MODES, which they are referred by the

mind, and intended to correspond to the ideas in the mind of some other

intelligent being, expressed by the names we apply to them, they may be

very deficient, wrong, and inadequate; because they agree not to that

which the mind designs to be their archetype and pattern: in which

respect only any idea of modes can be wrong, imperfect, or inadequate.

And on this account our ideas of mixed modes are the most liable to

be faulty of any other; but this refers more to proper speaking than

knowing right.

6. Ideas of Substances, as referred to real Essences, not adequate.

Thirdly, what IDEAS WE HAVE OF SUBSTANCES, I have above shown. Now,

those ideas have in the mind a double reference: 1. Sometimes they

are referred to a supposed real essence of each species of things. 2.

Sometimes they are only designed to be pictures and representations in

the mind of things that do exist, by ideas of those qualities that are

discoverable in them. In both which ways these copies of those originals

and archetypes are imperfect and inadequate.

First, it is usual for men to make the names of substances stand for

things as supposed to have certain real essences, whereby they are of

this or that species: and names standing for nothing but the ideas that

are in men's minds, they must constantly refer their ideas to such real

essences, as to their archetypes. That men (especially such as have been

bred up in the learning taught in this part of the world) do suppose

certain specific essences of substances, which each individual in its

several kinds is made conformable to and partakes of, is so far from

needing proof that it will be thought strange if any one should do

otherwise. And thus they ordinarily apply the specific names they rank

particular substances under, to things as distinguished by such specific

real essences. Who is there almost, who would not take it amiss if

it should be doubted whether he called himself a man, with any other

meaning than as having the real essence of a man? And yet if you demand

what those real essences are, it is plain men are ignorant, and know

them not. From whence it follows, that the ideas they have in their

minds, being referred to real essences, as to archetypes which are

unknown, must be so far from being adequate that they cannot be supposed

to be any representation of them at all. The complex ideas we have of

substances are, as it has been shown, certain collections of simple

ideas that have been observed or supposed constantly to exist together.

But such a complex idea cannot be the real essence of any substance;

for then the properties we discover in that body would depend on that

complex idea, and be deducible from it, and their necessary connexion

with it be known; as al properties of a triangle depend on, and, as far

as they are discoverable, are deducible from the complex idea of three

lines including a space. But it is plain that in our complex ideas

of substances are not contained such ideas, on which al the other

qualities that are to be found in them do depend. The common idea men

have of iron is, a body of a certain colour, weight, and hardness; and a

property that they look on as belonging to it, is malleableness. But yet

this property has no necessary connexion with that complex idea, or any

part of it: and there is no more reason to think that malleableness

depends on that colour, weight, and hardness, than that colour or that

weight depends on its malleableness. And yet, though we know nothing of

these real essences, there is nothing more ordinary than that men should

attribute the sorts of things to such essences. The particular parcel of

matter which makes the ring I have on my finger is forwardly by most men

supposed to have a real essence, whereby it is gold; and from whence

those qualities flow which I find in it, viz. its peculiar colour,

weight, hardness, fusibility, fixedness, and change of colour upon

a slight touch of mercury, &c. This essence, from which all these

properties flow, when I inquire into it and search after it, I plainly

perceive I cannot discover: the furthest I can go is, only to presume

that, it being nothing but body, its real essence or internal

constitution, on which these qualities depend, can be nothing but the

figure, size, and connexion of its solid parts; of neither of which

having any distinct perception at all can I have any idea of its

essence: which is the cause that it has that particular shining

yellowness; a greater weight than anything I know of the same bulk; and

a fitness to have its colour changed by the touch of quicksilver. If any

one wil say, that the real essence and internal constitution, on which

these properties depend, is not the figure, size, and arrangement or

connexion of its solid parts, but something else, called its particular

FORM, I am further from having any idea of its real essence than I was

before. For I have an idea of figure, size, and situation of solid

parts in general, though I have none of the particular figure, size, or

putting together of parts, whereby the qualities above mentioned are

produced; which qualities I find in that particular parcel of matter

that is on my finger, and not in another parcel of matter, with which I

cut the pen I write with. But, when I am told that something besides

the figure, size, and posture of the solid parts of that body in its

essence, something cal ed SUBSTANTIAL FORM, of that I confess I have no

idea at al , but only of the sound form; which is far enough from an

idea of its real essence or constitution. The like ignorance as I have

of the real essence of this particular substance, I have also of the

real essence of all other natural ones: of which essences I confess I

have no distinct ideas at al ; and, I am apt to suppose, others, when

they examine their own knowledge, wil find in themselves, in this one

point, the same sort of ignorance.

7. Because men know not the real essence of substances.

Now, then, when men apply to this particular parcel of matter on my

finger a general name already in use, and denominate it GOLD, do they

not ordinarily, or are they not understood to give it that name, as

belonging to a particular species of bodies, having a real internal

essence; by having of which essence this particular substance comes to

be of that species, and to be called by that name? If it be so, as it is

plain it is, the name by which things are marked as having that essence

must be referred primarily to that essence; and consequently the idea to

which that name is given must be referred also to that essence, and be

intended to represent it. Which essence, since they who so use the names

know not, their ideas of substances must be al inadequate in that

respect, as not containing in them that real essence which the mind

intends they should.

8. Ideas of Substances, when regarded as Collections of their Qualities,

are all inadequate.

Secondly, those who, neglecting that useless supposition of unknown

real essences, whereby they are distinguished, endeavour to copy the

substances that exist in the world, by putting together the ideas of

those sensible qualities which are found co-existing in them, though

they come much nearer a likeness of them than those who imagine they

know not what real specific essences: yet they arrive not at perfectly

adequate ideas of those substances they would thus copy into their

minds: nor do those copies exactly and fully contain all that is to

be found in their archetypes. Because those qualities and powers of

substances, whereof we make their complex ideas, are so many and

various, that no man's complex idea contains them al . That our complex

ideas of substances do not contain in them ALL the simple ideas that are

united in the things themselves is evident, in that men do rarely put

into their complex idea of any substance al the simple ideas they do

know to exist in it. Because, endeavouring to make the signification of

their names as clear and as little cumbersome as they can, they make

their specific ideas of the sorts of substance, for the most part, of

a few of those simple ideas which are to be found in them: but these

having no original precedency, or right to be put in, and make the

specific idea, more than others that are left out, it is plain that both

these ways our ideas of substances are deficient and inadequate. The

simple ideas whereof we make our complex ones of substances are all of

them (bating only the figure and bulk of some sorts) powers; which being

relations to other substances, we can never be sure that we know ALL the

powers that are in any one body, till we have tried what changes it is

fitted to give to or receive from other substances in their several ways

of application: which being impossible to be tried upon any one body,

much less upon all, it is impossible we should have adequate ideas of

any substance made up of a collection of al its properties.

9. Their powers usually make up our complex ideas of substances.

Whosoever first lighted on a parcel of that sort of substance we denote

by the word GOLD, could not rationally take the bulk and figure he

observed in that lump to depend on its real essence, or internal

constitution. Therefore those never went into his idea of that species

of body; but its peculiar colour, perhaps, and weight, were the first he

abstracted from it, to make the complex idea of that species. Which both

are but powers; the one to affect our eyes after such a manner, and to

produce in us that idea we cal yellow; and the other to force upwards

any other body of equal bulk, they being put into a pair of equal

scales, one against another. Another perhaps added to these the ideas of

fusibility and fixedness, two other passive powers, in relation to the

operation of fire upon it; another, its ductility and solubility in aqua

regia, two other powers, relating to the operation of other bodies, in

changing its outward figure, or separation of it into insensible parts.

These, or parts of these, put together, usually make the complex idea in

men's minds of that sort of body we cal GOLD.

10. Substances have innumerable powers not contained in our complex

ideas of them.

But no one who hath considered the properties of bodies in general, or

this sort in particular, can doubt that this, called GOLD, has infinite

other properties not contained in that complex idea. Some who have

examined this species more accurately could, I believe, enumerate ten

times as many properties in gold, all of them as inseparable from its

internal constitution, as its colour or weight: and it is probable, if

any one knew al the properties that are by divers men known of this

metal, there would be an hundred times as many ideas go to the complex

idea of gold as any one man yet has in his; and yet perhaps that not be

the thousandth part of what is to be discovered in it. The changes that

that one body is apt to receive, and make in other bodies, upon a due

application, exceeding far not only what we know, but what we are apt to

imagine. Which wil not appear so much a paradox to any one who wil but

consider how far men are yet from knowing al the properties of that

one, no very compound figure, a triangle; though it be no small number

that are already by mathematicians discovered of it.

11. Ideas of Substances, being got only by collecting their qualities,

are all inadequate.

So that al our complex ideas of substances are imperfect and

inadequate. Which would be so also in mathematical figures, if we were

to have our complex ideas of them, only by collecting their properties

in reference to other figures. How uncertain and imperfect would our

ideas be of an ellipsis, if we had no other idea of it, but some few of

its properties? Whereas, having in our plain idea the WHOLE essence

of that figure, we from thence discover those properties, and

demonstratively see how they flow, and are inseparable from it.

12. Simple Ideas, [word in Greek], and adequate.

Thus the mind has three sorts of abstract ideas or nominal essences:

First, SIMPLE ideas, which are [word in Greek] or copies; but yet

certainly adequate. Because, being intended to express nothing but the

power in things to produce in the mind such a sensation, that sensation,

when it is produced, cannot but be the effect of that power. So the

paper I write on, having the power in the light (I speak according to

the common notion of light) to produce in men the sensation which I cal

white, it cannot but be the effect of such a power in something without

the mind; since the mind has not the power to produce any such idea in

itself: and being meant for nothing else but the effect of such a power

that simple idea is [* words missing] the sensation of white, in my

mind, being the effect of that power which is in the paper to produce

it, is perfectly adequate to that power; or else that power would

produce a different idea.

13. Ideas of Substances are Echthypa, and inadequate.

Secondly, the COMPLEX ideas of SUBSTANCES are ectypes, copies too; but

not perfect ones, not adequate: which is very evident to the mind, in

that it plainly perceives, that whatever collection of simple ideas it

makes of any substance that exists, it cannot be sure that it exactly

answers all that are in that substance. Since, not having tried all

the operations of all other substances upon it, and found al the

alterations it would receive from, or cause in, other substances, it

cannot have an exact adequate collection of all its active and passive

capacities; and so not have an adequate complex idea of the powers of

any substance existing, and its relations; which is that sort of complex

idea of substances we have. And, after al , if we would have, and

actually had, in our complex idea, an exact collection of all the

secondary qualities or powers of any substance, we should not yet

thereby have an idea of the ESSENCE of that thing. For, since the powers

or qualities that are observable by us are not the real essence of that

substance, but depend on it, and flow from it, any col ection whatsoever

of these qualities cannot be the real essence of that thing. Whereby it

is plain, that our ideas of substances are not adequate; are not what

the mind intends them to be. Besides, a man has no idea of substance in

general, nor knows what substance is in itself.

14. Ideas of Modes and Relations are Archetypes, and cannot be adequate.

Thirdly, COMPLEX ideas of MODES AND RELATIONS are originals, and

archetypes; are not copies, nor made after the pattern of any real

existence, to which the mind intends them to be conformable, and exactly

to answer. These being such collections of simple ideas that the mind

itself puts together, and such col ections that each of them contains

in it precisely all that the mind intends that it should, they are

archetypes and essences of modes that may exist; and so are designed

only for, and beling only to such modes as, when they do exist, have an

exact conformity with those complex ideas The ideas, therefore, of modes

and relations cannot but be adequate.

CHAPTER XXXII.

OF TRUE AND FALSE IDEAS.

1. Truth and Falsehood properly belong to Propositions, not to Ideas.

Though truth and falsehood belong, in propriety of speech, only to

PROPOSITIONS: yet IDEAS are oftentimes termed true or false (as what

words are there that are not used with great latitude, and with some

deviation from their strict and proper significations?) Though I think

that when ideas themselves are termed true or false, there is still

some secret or tacit proposition, which is the foundation of that

denomination: as we shall see, if we examine the particular occasions

wherein they come to be cal ed true or false. In al which we shall

find some kind of affirmation or negation, which is the reason of that

denomination. For our ideas, being nothing but bare APPEARANCES, or

perceptions in our minds, cannot properly and simply in themselves be

said to be true or false, no more than a single name of anything can be

said to be true or false.

2. Ideas and words may be said to be true, inasmuch as they really are

ideas and words.

Indeed both ideas and words may be said to be true, in a metaphysical

sense of the word truth; as all other things that any way exist are

said to be true, i.e. really to be such as they exist. Though in things

called true, even in that sense, there is perhaps a secret reference to

our ideas, looked upon as the standards of that truth; which amounts to

a mental proposition, though it be usually not taken notice of.

3. No Idea, as an Appearance in the Mind, either true or false.

But it is not in that metaphysical sense of truth which we inquire here,

when we examine, whether our ideas are capable of being true or false,

but in the more ordinary acceptation of those words: and so I say that

the ideas in our minds, being only so many perceptions or appearances

there, none of them are false; the idea of a centaur having no more

falsehood in it when it appears in our minds, than the name centaur has

falsehood in it, when it is pronounced by our mouths, or written on

paper. For truth or falsehood lying always in some affirmation or

negation, mental or verbal, our ideas are not capable, any of them,

of being false, til the mind passes some judgment on them; that is,

affirms or denies something of them.

4. Ideas referred to anything extraneous to them may be true or false.

Whenever the mind refers any of its ideas to anything extraneous to

them, they are then capable to be called true or false. Because the

mind, in such a reference, makes a tacit supposition of their conformity

to that thing; which supposition, as it happens to be true or false,

so the ideas themselves come to be denominated. The most usual cases

wherein this happens, are these following:

5. Other Men's Ideas; real Existence; and supposed real Essences, are

what Men usually refer their Ideas to.

First, when the mind supposes any idea it has CONFORMABLE to th