The best way to teach morality is to make it a habit with children.

Beauty depends on size as well as symmetry. No very small animal can be beautiful, for looking at it takes so small a portion of time that the impression of it will be confused. Nor can any very large one, for a whole view of it cannot be had at once, and so there will be no unity and completeness.

It is clear that those constitutions which aim at the common good are right, as being in accord with absolute justice; while those which aim only at the good of the rulers are wrong.

Art takes nature as its model.

What you have to learn to do, you learn by doing.

It is no part of a physician's business to use either persuasion or compulsion upon the patients.

By 'life,' we mean a thing that can nourish itself and grow and decay.