Cynic, origin of name, 130; influence of school on Plato, 154; _v._ Epicurean, 226 Cyrene, seat of Cyrenaic school, 124; visited by Plato, 134; influence of school on Plato, 154 Death, birth of the soul, 19 Deduction, _v._ Induction, 48; function of, in Aristotle, 184 Definitions, search for, by Socrates, 106; of no value, 132; rules for, laid down by Plato, 156 Democritus, 74; relation of Epicurus to, 216 Demonstrative science, based on abstraction, 11 Desire, part of soul, 28, 169; thought without, gives no motive, 191; distinctions among, 224 Destruction, meaning of, 53 Dialectic, Parmenides founder of, 39; Zeno inventor of, 42; Platonic theory of, 164, 171 Dichotomy, invented by Zeno, 43 Difference (see _Essence_), all difference quantitative, 76; conditioned by dissimilarity in atoms, 77 Dilemma, Melissus' use of, 46 Diogenes, pupil of Antisthenes, 130 Dionysius, elder and younger, connection of Plato with, 135 Diotima, conversation of, with Socrates, 137 Dry light, 19 Dualism, unthinkable, 32; in nature, 38; of Plato and Aristotle, 184 Dynamic, see _Potentiality_ Earth, principle in nature, 38 Education, preparation for heaven, 148; ideal, 149; true function of, 169; three stages, 170; an entelechy, 191 Egypt, visited by Pythagoras, 22; Democritus, 74; Plato, 135 Elea, seat of Eleatic school, 30; birthplace of Parmenides, 33 Eleatics, relation of Empedocles to, 62; of Democritus, 75; of Plato, 154, 165 Elements, the four, 62; in creation, 151; in body and in soul, 156 Empedocles, 58 Ends of Life, indifference as to, 96; importance in later Greek philosophy, 125; Plato's view of, 168; Aristotle's, 193; Epicurean, 222 Entelechy, Life, 186, 190; God, 188; Thought, _ib._; Education, 191; Morality, 193; State, 197; physical world, 199; Soul, 203 Ephesus, birthplace of Heraclitus, 15 Epicurus, 211; praises of, by Lucretius, 212; garden of, 213; relation to Democritus, 216 Essence _v._ Difference, 48; equals Cause, 167 Euclides, 132 Euripides, friend of Anaxagoras, 52 Euthydemus, conversation with Socrates, 116; dialogue, 137 Euthyphro, dialogue, 136 Even, _v._ Odd, 24 Evil, origin of, 33; necessary on earth, 168; God cause of evil, but hath none, 234 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 Genus, has less of existence than species, 183