Idealism, 36. See Absolutism.
Identity, 93.
Immortality, Fechner's view of, 171.
'Independent' beings, 55, 58.
Indeterminism, 77.
Infinity, 229.
Influence, 258, 561.
Intellect, its function is practical, 247 f., 252.
Intellectualism, vicious, 60, 218.
Intellectualist logic, 216, 259, 261.