Book 2
5
On the other hand there can be no infinite progression downwards (where there is a beginning in the upper direction) such that from fire comes water, and from water earth, and in this way some other kind of thing is always being produced. There are two senses in which one thing comes from another—apart from that in which one thing is said to come after another, e.g. the Olympian fromἐκ means not only from but after; Aristotle dismisses this latter meaning. The Isthmian fell alternatively in the same year as the Olympian festival; when this happened the former was held in the spring and the latter in the summer. Cf. Aristot. Met. 5.24.5. the Isthmian games—either as a man comes from a child as it develops, or as air comes from water.
6
Now we say that a man comes from a child in the sense that that which has become something comes from that which is becoming: i.e. the perfect from the imperfect. (For just as becoming is always intermediate between being and not-being, so is that which is becoming between what is and what is not. The learner is becoming informed, and that is the meaning of the statement that the informed person comes from the learner.)
