As, then, the exercises of the faculties vary, so do their respective pleasures. Sight is purer than touch, hearing and smell than taste: 250 there is a corresponding difference, therefore, between their pleasures; and the pleasures of the intellect are purer than these pleasures of sense, and some of each kind are purer than others.

Each kind of being, again, seems to have its proper pleasure, as it has its proper function⁠— viz. the pleasure which accompanies the exercise of its faculties or the realization of its nature. And a separate consideration of the several kinds of animals will confirm this: the pleasures of a horse, a dog, and a man are all different⁠—as Heraclitus says, a donkey would prefer hay to gold; for there is more pleasure in fodder than in gold to a donkey.