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Rh that one born blind who should suddenly receive sight would do the same. This conception of distances is therefore a judgment;—no intuition, but an arrangement of my different intuitions by means of the understanding. I may err in my estimate of the size, distance, &c. of an object; and the so-called optical deceptions are not deceptions of sight, but erroneous judgments formed concerning the size of the object, concerning the size of its different parts in relation to each other, and consequently concerning its true figure and its distance from me and from other objects. But it does really exist in space, as I contemplate it, and the colours which I see in it are likewise really seen by me;—and here there is no deception.

Spirit. And what then is the principle of this judgment, to take the most distinct and easy case,—thy judgment of the proximity or distance of objects,—how dost thou estimate this distance?

I. Doubtless by the greater strength or feebleness of impressions otherwise equal. I see before me two objects of the same red colour. The one whose colour I see more vividly, I regard as the nearer; that whose colour seems to me fainter, as the more distant, and as so much the more distant as the colour seems fainter.

Spirit. Thus thou dost estimate the distance according to the degree of strength or weakness in the sensation; and this strength or weakness itself, dost thou also estimate it?

I. Obviously only in so far as I take note of my own affections, and even of very slight differences in these.—Thou hast conquered! All consciousness of objects out of myself is determined by the clearness and exactitude