Note 183 — Chapter VII · HEDONISM AND EVOLUTIONISM.
Reading edition
Hamilton, Lectures, ii. 440: "Pleasure is the reflex of the spontaneous and unimpeded exertion of a power of whose energies we are conscious. Pain, a reflex of the overstrained or repressed exertion of such a power." Cf. Aristotle, Eth. N., vii. 12, p. 1153 a 14, x. 4, p. 1174 b 20.