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98 also in space, and superadd it to the mass by which I regard space as filled.

Spirit. And what then, according to thy view, is the nature of the relation subsisting between this force and the mass?

I. The mass, with its properties, is itself the result and manifestation of the inward force. This force has two modes of operation:—one whereby it maintains itself, and assumes this particular form in which it appears; another upon me, by which it affects me in a particular manner.

Spirit. Thou hast formerly sought for another substratum for sensible attributes or qualities than the space which contains them; something permanent amid the vicissitudes of perpetual change besides this space.

I. Yes, and this permanent substratum is found. It is force itself. This remains for ever the same amid all change, and it is this which assumes and supports all sensible attributes or qualities.

Spirit. Let us cast a glance back on all that we have now established. Thou feelest thyself in a certain state, affected in a certain manner, which thou callest red, smooth, sweet, and so on. Of this thou knowest nothing, but simply that thou feelest, and feelest in this particular manner. Or dost thou know more than this? Is there in mere sensation anything more than mere sensation?

I. No.

Spirit. Further, it is by thine own nature as an intelligence, that there is a space spread out before thee;—or dost thou know anything more than this concerning space?