Husk, symbol of evolution, 12
Idea, exists prior to sensation, 143; eternal in universe, 150; rational element in sensation, 152; Platonic criticism of, 157; universals are ideas of real existences, 163; things partake of, 164; relation of, to Pythagorean 'Numbers,' 167; Aristotelian criticism of, 181; necessarily prior to sensation, 187
Ideal, struggle of old and new, 99; in the arts, 110; has three aspects, Justice, Beauty, Utility, ib.; great ideal in the universe, 112; can never wholly fit the real, 239
Idealism, v. Practicality, 4, 96; Parmenides founder of, 39; v.
Realism, 51; v. Epicureanism, 216
Immortality, aspect of, to Greeks, 40; Parmenides pioneer for, 41; Phaedo dialogue on, 136; Love and immortality, 138; of soul, 150; relation of doctrine to Platonic recollection, 154; faith as to, 155; Man must put on, 168; Aristotle's view of, 207
Inconsistency, not forbidden in philosophy, 64
Individual, v. Universal, 99; relation of, to community, 147, 196; reality of, 184; importance of, in later systems, 243
Individualism, in philosophy, 83, 85; not wholly bad, 98; required reconciling with universalism, 100
Induction (see Deduction); Socrates inventor of, 106; Plato's contributions to, 160; function of, in Aristotle, 184
Infinite or indefinite, origin of things, 8; function of, in mathematics, 10; relation to definite, 24, 26, 165