CHAPTER IV. OF THE REALITY OF KNOWLEDGE.

1. Objection. 'Knowledge placed in our Ideas may be all unreal or

chimerical'

I DOUBT not but my reader, by this time, may be apt to think that I have

been all this while only building a castle in the air; and be ready to

say to me:--

'To what purpose all this stir? Knowledge, say you, is only the

perception of the agreement or disagreement of our own ideas: but who

knows what those ideas may be? Is there anything so extravagant as the

imaginations of men's brains? Where is the head that has no chimeras in

it? Or if there be a sober and a wise man, what difference will

there be, by your rules, between his knowledge and that of the most

extravagant fancy in the world? They both have their ideas, and perceive

their agreement and disagreement one with another. If there be any

difference between them, the advantage will be on the warm-headed man's

side, as having the more ideas, and the more lively. And so, by your

rules, he will be the more knowing. If it be true, that all knowledge

lies only in the perception of the agreement or disagreement of our own

ideas, the visions of an enthusiast and the reasonings of a sober man

will be equally certain. It is no matter how things are: so a man

observe but the agreement of his own imaginations, and talk conformably,

it is all truth, all certainty. Such castles in the air will be as

strongholds of truth, as the demonstrations of Euclid. That an harpy is

not a centaur is by this way as certain knowledge, and as much a truth,

as that a square is not a circle.

'But of what use is all this fine knowledge of MEN'S OWN IMAGINATIONS,

to a man that inquires after the reality of things? It matters not what

men's fancies are, it is the knowledge of things that is only to be

prized: it is this alone gives a value to our reasonings, and preference

to one man's knowledge over another's, that it is of things as they

really are, and not of dreams and fancies.'

2. Answer Not so, where Ideas agree with Things.

To which I answer, That if our knowledge of our ideas terminate in them,

and reach no further, where there is something further intended, our

most serious thoughts will be of little more use than the reveries of

a crazy brain; and the truths built thereon of no more weight than the

discourses of a man who sees things clearly in a dream, and with great

assurance utters them. But I hope, before I have done, to make it

evident, that this way of certainty, by the knowledge of our own ideas,

goes a little further than bare imagination: and I believe it will

appear that all the certainty of general truths a man has lies in

nothing else.

3. But what shall be the criterion of this agreement?

It is evident the mind knows not things immediately, but only by the

intervention of the ideas it has of them. Our knowledge, therefore, is

real only so far as there is a CONFORMITY between our ideas and the

reality of things. But what shall be here the criterion? How shall the

mind, when it perceives nothing but its own ideas, know that they agree

with things themselves? This, though it seems not to want difficulty,

yet, I think, there be two sorts of ideas that we may be assured agree

with things.

4. As, First All Simple Ideas are really conformed to Things.

FIRST, The first are simple ideas, which since the mind, as has been

showed, can by no means make to itself, must necessarily be the product

of things operating on the mind, in a natural way, and producing therein

those perceptions which by the Wisdom and Will of our Maker they are

ordained and adapted to. From whence it follows, that simple ideas are

not fictions of our fancies, but the natural and regular productions of

things without us, really operating upon us; and so carry with them all

the conformity which is intended; or which our state requires: for they

represent to us things under those appearances which they are fitted

to produce in us: whereby we are enabled to distinguish the sorts of

particular substances, to discern the states they are in, and so to take

them for our necessities, and apply them to our uses. Thus the idea of

whiteness, or bitterness, as it is in the mind, exactly answering

that power which is in any body to produce it there, has all the real

conformity it can or ought to have, with things without us. And this

conformity between our simple ideas and the existence of things, is

sufficient for real knowledge.

5. Secondly, All Complex Ideas, except ideas of Substances, are their

own archetypes.

Secondly, All our complex ideas, EXCEPT THOSE OF SUBSTANCES, being

archetypes of the mind's own making, not intended to be the copies

of anything, nor referred to the existence of anything, as to their

originals, cannot want any conformity necessary to real knowledge. For

that which is not designed to represent anything but itself, can never

be capable of a wrong representation, nor mislead us from the true

apprehension of anything, by its dislikeness to it: and such, excepting

those of substances, are all our complex ideas. Which, as I have showed

in another place, are combinations of ideas, which the mind, by its free

choice, puts together, without considering any connexion they have in

nature. And hence it is, that in all these sorts the ideas themselves

are considered as the archetypes, and things no otherwise regarded, but

as they are conformable to them. So that we cannot but be infallibly

certain, that all the knowledge we attain concerning these ideas is

real, and reaches things themselves. Because in all our thoughts,

reasonings, and discourses of this kind, we intend things no further

than as they are conformable to our ideas. So that in these we cannot

miss of a certain and undoubted reality.

6. Hence the reality of Mathematical Knowledge

I doubt not but it will be easily granted, that the knowledge we have of

mathematical truths is not only certain, but real knowledge; and not the

bare empty vision of vain, insignificant chimeras of the brain: and yet,

if we will consider, we shall find that it is only of our own ideas.

The mathematician considers the truth and properties belonging to a

rectangle or circle only as they are in idea in his own mind. For it is

possible he never found either of them existing mathematically, i.e.

precisely true, in his life. But yet the knowledge he has of any truths

or properties belonging to a circle, or any other mathematical figure,

are nevertheless true and certain, even of real things existing: because

real things are no further concerned, nor intended to be meant by any

such propositions, than as things really agree to those archetypes in

his mind. Is it true of the IDEA of a triangle, that its three angles

are equal to two right ones? It is true also of a triangle, wherever

it REALLY EXISTS. Whatever other figure exists, that it is not exactly

answerable to that idea of a triangle in his mind, is not at all

concerned in that proposition. And therefore he is certain all his

knowledge concerning such ideas is real knowledge: because, intending

things no further than they agree with those his ideas, he is sure

what he knows concerning those figures, when they have BARELY AN IDEAL

EXISTENCE in his mind, will hold true of them also when they have A REAL

EXISTANCE in matter: his consideration being barely of those figures,

which are the same wherever or however they exist.

7. And of Moral.

And hence it follows that moral knowledge is as capable of real

certainty as mathematics. For certainty being but the perception of the

agreement or disagreement of our ideas, and demonstration nothing but

the perception of such agreement, by the intervention of other ideas

or mediums; our moral ideas, as well as mathematical, being archetypes

themselves, and so adequate and complete ideas; all the agreement or

disagreement which we shall find in them will produce real knowledge, as

well as in mathematical figures.

8. Existence not required to make Abstract Knowledge real.

[For the attaining of knowledge and certainty, it is requisite that we

have determined ideas:] and, to make our knowledge real, it is requisite

that the ideas answer their archetypes. Nor let it be wondered, that I

place the certainty of our knowledge in the consideration of our ideas,

with so little care and regard (as it may seem) to the real existence of

things: since most of those discourses which take up the thoughts and

engage the disputes of those who pretend to make it their business to

inquire after truth and certainty, will, I presume, upon examination, be

found to be general propositions, and notions in which existence is not

at all concerned. All the discourses of the mathematicians about the

squaring of a circle, conic sections, or any other part of mathematics,

concern not the existence of any of those figures: but their

demonstrations, which depend on their ideas, are the same, whether there

be any square or circle existing in the world or no. In the same manner,

the truth and certainty of moral discourses abstracts from the lives of

men, and the existence of those virtues in the world whereof they treat:

nor are Tully's Offices less true, because there is nobody in the world

that exactly practises his rules, and lives up to that pattern of a

virtuous man which he has given us, and which existed nowhere when he

writ but in idea. If it be true in speculation, i.e. in idea, that

murder deserves death, it will also be true in reality of any action

that exists conformable to that idea of murder. As for other

actions, the truth of that proposition concerns them not. And thus it is

of all other species of things, which have no other essences but those

ideas which are in the minds of men.

9. Nor will it be less true or certain, because Moral Ideas are of our

own making and naming.

But it will here be said, that if moral knowledge be placed in the

contemplation of our own moral ideas, and those, as other modes, be

of our own making, What strange notions will there be of justice and

temperance? What confusion of virtues and vices, if every one may make

what ideas of them he pleases? No confusion or disorder in the things

themselves, nor the reasonings about them; no more than (in mathematics)

there would be a disturbance in the demonstration, or a change in the

properties of figures, and their relations one to another, if a man

should make a triangle with four corners, or a trapezium with four right

angles: that is, in plain English, change the names of the figures, and

call that by one name, which mathematicians call ordinarily by another.

For, let a man make to himself the idea of a figure with three angles,

whereof one is a right one, and call it, if he please, EQUILATERUM or

TRAPEZIUM, or anything else; the properties of, and demonstrations about

that idea will be the same as if he called it a rectangular triangle. I

confess the change of the name, by the impropriety of speech, will at

first disturb him who knows not what idea it stands for: but as soon as

the figure is drawn, the consequences and demonstrations are plain and

clear. Just the same is it in moral knowledge: let a man have the idea

of taking from others, without their consent, what their honest industry

has possessed them of, and call this JUSTICE if he please. He that takes

the name here without the idea put to it will be mistaken, by joining

another idea of his own to that name: but strip the idea of that name,

or take it such as it is in the speaker's mind, and the same things will

agree to it, as if you called it INJUSTICE. Indeed, wrong names in moral

discourses breed usually more disorder, because they are not so easily

rectified as in mathematics, where the figure, once drawn and seen,

makes the name useless and of no force. For what need of a sign, when

the thing signified is present and in view? But in moral names, that

cannot be so easily and shortly done, because of the many decompositions

that go to the making up the complex ideas of those modes. But yet for

all this, the miscalling of any of those ideas, contrary to the usual

signification of the words of that language, hinders not but that we may

have certain and demonstrative knowledge of their several agreements and

disagreements, if we will carefully, as in mathematics, keep to the same

precise ideas, and trace THEM in their several relations one to another,

without being led away by their names. If we but separate the idea under

consideration from the sign that stands for it, our knowledge goes

equally on in the discovery of real truth and certainty, whatever sounds

we make use of.

10. Misnaming disturbs not the certainty of the Knowledge

One thing more we are to take notice of, That where God or any other

law-maker, hath defined any moral names, there they have made the

essence of that species to which that name belongs; and there it is

not safe to apply or use them otherwise: but in other cases it is bare

impropriety of speech to apply them contrary to the common usage of

the country. But yet even this too disturbs not the certainty of that

knowledge, which is still to be had by a due contemplation and comparing

of those even nick-named ideas.

11. Thirdly, Our complex Ideas of Substances have their Archetypes

without us; and here knowledge comes short.

THIRDLY, There is another sort of complex ideas, which, being referred

to archetypes without us, may differ from them, and so our knowledge

about them may come short of being real. Such are our ideas of

substances, which, consisting of a collection of simple ideas, supposed

taken from the works of nature, may yet vary from them; by having more

or different ideas united in them than are to be found united in the

things themselves. From whence it comes to pass, that they may, and

often do, fail of being exactly conformable to things themselves.

12. So far as our complex ideas agree with those Archetypes without us,

so far our Knowledge concerning Substances is real.

I say, then, that to have ideas of SUBSTANCES which, by being

conformable to things, may afford us real knowledge, it is not enough,

as in MODES, to put together such ideas as have no inconsistence, though

they did never before so exist: v.g. the ideas of sacrilege or perjury,

&c., were as real and true ideas before, as after the existence of any

such fact. But our ideas of substances, being supposed copies, and

referred to archetypes without us, must still be taken from something

that does or has existed: they must not consist of ideas put together at

the pleasure of our thoughts, without any real pattern they were taken

from, though we can perceive no inconsistence in such a combination. The

reason whereof is because we, knowing not what real constitution it is

of substances whereon our simple ideas depend, and which really is the

cause of the strict union of some of them one with another, and the

exclusion of others; there are very few of them that we can be sure

are or are not inconsistent in nature: any further than experience and

sensible observation reach Herein, therefore, is founded the reality of

our knowledge concerning substances--That all our complex ideas of them

must be such, and such only, as are made up of such simple ones as have

been discovered to co-exist in nature. And our ideas being thus true,

though not perhaps very exact copies, are yet the subjects of real (as

far as we have any) knowledge of them. Which (as has been already shown)

will not be found to reach very far: but so far as it does, it will

still be real knowledge. Whatever ideas we have, the agreement we

find they have with others will still be knowledge. If those ideas be

abstract, it will be general knowledge. But to make it real concerning

substances, the ideas must be taken from the real existence of things.

Whatever simple ideas have been found to co-exist in any substance,

these we may with confidence join together again, and so make abstract

ideas of substances. For whatever have once had an union in nature, may

be united again.

13. In our inquiries about Substances, we must consider Ideas, and not

confine our Thoughts to Names, or Species supposed set out by Names.

This, if we rightly consider, and confine not our thoughts and abstract

ideas to names, as if there were, or could be no other SORTS of things

than what known names had already determined, and, as it were, set out,

we should think of things with greater freedom and less confusion than

perhaps we do. It would possibly be thought a bold paradox, if not a

very dangerous falsehood, if I should say that some CHANGELINGS, who

have lived forty years together, without any appearance of reason, are

something between a man and a beast: which prejudice is founded upon

nothing else but a false supposition, that these two names, man and

beast, stand for distinct species so set out by real essences, that

there can come no other species between them: whereas if we will

abstract from those names, and the supposition of such specific essences

made by nature, wherein all things of the same denominations did exactly

and equally partake; if we would not fancy that there were a certain

number of these essences, wherein all things, as in moulds, were cast

and formed; we should find that the idea of the shape, motion, and life

of a man without reason, is as much a distinct idea, and makes as much a

distinct sort of things from man and beast, as the idea of the shape of

an ass with reason would be different from either that of man or beast,

and be a species of an animal between, or distinct from both.

14. Objection against a Changeling being something between a Man and

Beast, answered.

Here everybody will be ready to ask, If changelings may be supposed

something between man and beast, pray what are they? I answer,

CHANGELINGS; which is as good a word to signify something different from

the signification of MAN or BEAST, as the names man and beast are to

have significations different one from the other. This, well considered,

would resolve this matter, and show my meaning without any more ado. But

I am not so unacquainted with the zeal of some men, which enables them

to spin consequences, and to see religion threatened, whenever any one

ventures to quit their forms of speaking, as not to foresee what names

such a proposition as this is like to be charged with: and without doubt

it will be asked, If changelings are something between man and beast,

what will become of them in the other world? To which I answer, I. It

concerns me not to know or inquire. To their own master they stand or

fall. It will make their state neither better nor worse, whether we

determine anything of it or no. They are in the hands of a faithful

Creator and a bountiful Father, who disposes not of his creatures

according to our narrow thoughts or opinions, nor distinguishes them

according to names and species of our contrivance. And we that know so

little of this present world we are in, may, I think, content ourselves

without being peremptory in defining the different states which

creatures shall come into when they go off this stage. It may suffice

us, that He hath made known to all those who are capable of instruction,

discoursing, and reasoning, that they shall come to an account, and

receive according to what they have done in this body.

15. What will become of Changelings in a future state?

But, Secondly, I answer, The force of these men's question (viz. Will

you deprive changelings of a future state?) is founded on one of these

two suppositions, which are both false. The first is, That all things

that have the outward shape and appearance of a man must necessarily be

designed to an immortal future being after this life: or, secondly, That

whatever is of human birth must be so. Take away these imaginations, and

such questions will be groundless and ridiculous. I desire then those

who think there is no more but an accidental difference between

themselves and changelings, the essence in both being exactly the same,

to consider, whether they can imagine immortality annexed to any outward

shape of the body; the very proposing it is, I suppose, enough to make

them disown it. No one yet, that ever I heard of, how much soever

immersed in matter, allowed that excellency to any figure of the gross

sensible outward consequence of it; or that any mass of matter

should, after its dissolution here, be again restored hereafter to an

everlasting state of sense, perception, and knowledge, only because it

was moulded into this or that figure, and had such a particular frame

of its visible parts. Such an opinion as this, placing immortality in a

certain superficial figure, turns out of doors all consideration of soul

or spirit; upon whose account alone some corporeal beings have hitherto

been concluded immortal, and others not. This is to attribute more to

the outside than inside of things; and to place the excellency of a man

more in the external shape of his body, than internal perfections of his

soul: which is but little better than to annex the great and inestimable

advantage of immortality and life everlasting, which he has above other

material beings, to annex it, I say, to the cut of his beard, or the

fashion of his coat. For this or that outward mark of our bodies no more

carries with it the hope of an eternal duration, than the fashion of a

man's suit gives him reasonable grounds to imagine it will never wear

out, or that it will make him immortal. It will perhaps be said, that

nobody thinks that the shape makes anything immortal, but it is the

shape that is the sign of a rational soul within, which is immortal. I

wonder who made it the sign of any such thing: for barely saying it,

will not make it so. It would require some proofs to persuade one of it.

No figure that I know speaks any such language. For it may as rationally

be concluded, that the dead body of a man, wherein there is to be found

no more appearance or action of life than there is in a statue, has yet

nevertheless a living soul in it, because of its shape; as that there

is a rational soul in a changeling, because he has the outside of a

rational creature, when his actions carry far less marks of reason with

them, in the whole course of his life than what are to be found in many

a beast.

16. Monsters

But it is the issue of rational parents, and must therefore be concluded

to have a rational soul. I know not by what logic you must so conclude.

I am sure this is a conclusion that men nowhere allow of. For if they

did, they would not make bold, as everywhere they do to destroy

ill-formed and mis-shaped productions. Ay, but these are MONSTERS.

Let them be so: what will your drivelling, unintelligent, intractable

changeling be? Shall a defect in the body make a monster; a defect in

the mind (the far more noble, and, in the common phrase, the far more

essential part) not? Shall the want of a nose, or a neck, make a

monster, and put such issue out of the rank of men; the want of reason

and understanding, not? This is to bring all back again to what was

exploded just now: this is to place all in the shape, and to take the

measure of a man only by his outside. To show that according to the

ordinary way of reasoning in this matter, people do lay the whole stress

on the figure, and resolve the whole essence of the species of man (as

they make it) into the outward shape, how unreasonable soever it be, and

how much soever they disown it, we need but trace their thoughts

and practice a little further, and then it will plainly appear. The

well-shaped changeling is a man, has a rational soul, though it appear

not: this is past doubt, say you: make the ears a little longer, and

more pointed, and the nose a little flatter than ordinary, and then you

begin to boggle: make the face yet narrower, flatter, and longer, and

then you are at a stand: add still more and more of the likeness of a

brute to it, and let the head be perfectly that of some other animal,

then presently it is a monster; and it is demonstration with you that it

hath no rational soul, and must be destroyed. Where now (I ask) shall be

the just measure; which the utmost bounds of that shape, that carries

with it a rational soul? For, since there have been human foetuses

produced, half beast and half man; and others three parts one, and one

part the other; and so it is possible they may be in all the variety of

approaches to the one or the other shape, and may have several degrees

of mixture of the likeness of a man, or a brute;--I would gladly know

what are those precise lineaments, which, according to this hypothesis,

are or are not capable of a rational soul to be joined to them. What

sort of outside is the certain sign that there is or is not such an

inhabitant within? For till that be done, we talk at random of MAN: and

shall always, I fear, do so, as long as we give ourselves up to certain

sounds, and the imaginations of settled and fixed species in nature, we

know not what. But, after all, I desire it may be considered, that those

who think they have answered the difficulty, by telling us, that a

mis-shaped foetus is a MONSTER, run into the same fault they are arguing

against; by constituting a species between man and beast. For what else,

I pray, is their monster in the case, (if the word monster signifies

anything at all,) but something neither man nor beast, but partaking

somewhat of either? And just so is the CHANGELING before mentioned. So

necessary is it to quit the common notion of species and essences, if we

will truly look into the nature of things, and examine them by what our

faculties can discover in them as they exist, and not by groundless

fancies that have been taken up about them.

17. Words and Species.

I have mentioned this here, because I think we cannot be too cautious

that words and species, in the ordinary notions which we have been used

to of them, impose not on us. For I am apt to think therein lies one

great obstacle to our clear and distinct knowledge, especially in

reference to substances: and from thence has rose a great part of the

difficulties about truth and certainty. Would we accustom ourselves to

separate our contemplations and reasonings from words, we might in a

great measure remedy this inconvenience within our own thoughts: but yet

it would still disturb us in our discourse with others, as long as we

retained the opinion, that SPECIES and their ESSENCES were anything else

but our abstract ideas (such as they are) with names annexed to them, to

be the signs of them.

18. Recapitulation.

Wherever we perceive the agreement or disagreement of any of our ideas,

there is certain knowledge: and wherever we are sure those ideas agree

with the reality of things, there is certain real knowledge. Of which

agreement of our ideas with the reality of things, having here given

the marks, I think, I have shown WHEREIN IT IS THAT CERTAINTY, REAL

CERTAINTY, CONSISTS. Which, whatever it was to others, was, I confess,

to me heretofore, one of those desiderata which I found great want of.

An Essay Concerning Humane Understanding, Volume 2 MDCXC, Based on the 2nd Edition, Books 3 and 4 · 第 4 / 21 章