Kitap 10
894
Ath. Further, things increase when combined and decrease when separated in all cases where the regular constitutioni.e. as solid, liquid, or gaseous substance. of each persists; but if this does not remain, then both these conditions cause them to perish. And what is the condition which must occur in everything to bring about generation? Obviously whenever a starting-principle receiving increase comes to the second change, and from this to the next, and on coming to the third admits of perception by percipients.This account of the derivation of the sense-world from the starting-principle (ἀρχή) is obscure. It is generally interpreted as a geometrical allegory, the stages of development being from point to line, from line to surface, from surface to solid,—this last only being perceptible by the senses (cp. Aristot. Soul 404 b 18 ff.). Everything comes into being by this process of change and alteration; and a thing is really existent whenever it remains fixed, but when it changes into another constitution it is utterly destroyed. Have we now, my friends, mentioned all the forms of motion, capable of numerical classification,The 8 kinds of motion here indicated are—(1) circular motion round a fixed center; (2) locomotion (gliding or rolling); (3) combination; (4) separation; (5) increase; (6) decrease; (7) becoming; (8) perishing. The remaining two kinds (as described below) are—(9) other-affecting motion (or secondary causation); and (10) self-and-other-affecting motion (or primary causation). save only two?
894
Clin. What two?
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Ath. Those, my good sir, for the sake of which, one may say, the whole of our present enquiry was undertaken.
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Clin. Explain more clearly.
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Ath. It was undertaken, was it not, for the sake of soul?
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Clin. Certainly.
