Evolution, Anaximander's conception of, 12; Xenophanes' theory of, 33; relation of, to fundamental conception of Being, ib.; view of Empedocles, 70
Existence, an idea prior to Time and Space, 37; not given by Experience, 45; four forms of, 166; philosophy treats of existence as such, 181
Exoteric kind of lectures, 175
Female, see Male
Fire, original of things, 17; one of two principles, 38
Flux, of all things, 16; of life, 27, 73; sophistic theory of, 87
Form v. Matter, 25, 48; Aristotle's theory of, 203
Formulae, never adequate, 122
Freewill, problem of, 33; relation to law, 113; and overruling providence, 155
Friendship, treated of in Lysis, 136