It has been discussed whether in his two defi nitions of nature in Physics II, Aristotle means a mover, a passive principle or both kinds of principles. I arguethat he means a mover. I discuss several occurrences of the expression archê kinêseôs (›principle of motion‹) in particular in Aristotle’s Metaphysics IX andPhysics (especially 255 b 29–31). Aristotle means most often a mover, sometimes»the time/site of the beginning of the motion« and never a passive principle.Finally, I briefl y discuss the status and function of the two defi nitions of nature within the context of Physics II and the entire Physics.
|Johannes Fritsche: Aristotele’s usage of [...] (›Principle of Motion‹) and the two Definitions of Nature in PHYSICS II, 1||7|