On The Motion Of Animals   

there flows from it the seminal potency, itself a kind of organism.

Again, it is a reasonable arrangement that the movements arise in

the centre upon movements in the parts, and in the parts upon

movements in the centre, and so reach one another. Conceive A to be

the centre or starting point. The movements then arrive at the

centre from each letter in the diagram we have drawn, and flow back

again from the centre which is moved and changes, (for the centre is

potentially multiple) the movement of B goes to B, that of C to C, the

movement of both to both; but from B to C the movements flow by dint

of going from B to A as to a centre, and then from A to C as from a

centre.

Moreover a movement contrary to reason sometimes does and

sometimes does not arise in the organs on the occasion of the same

thoughts; the reason is that sometimes the matter which is passive

to the impressions is there in sufficient quantity and of the right

quality and sometimes not.

And so we have finished our account of the reasons for the parts

of each kind of animal, of the soul, and furthere of sense-perception,

of sleep, of memory, and of movement in general; it remains to speak

of animal generation.





-THE END-