The seen is the changing, the unseen is the unchanging.

Knowledge of the soul is the only universal truth and the only wisdom - all other knowledge is transient.

Desires are only the lack of something: and those who have the greatest desires are in a worse condition than those who have none, or very slight ones.

May I deem the wise man rich, and may I have such a portion of gold as none but a prudent man can either bear or employ.

Even the good artisans fell into the same error as the poets; because they were good workmen they thought that they also knew all sorts of high matters, and this defect in them overshadowed their wisdom.

I have hardly ever known a mathematician who was capable of reasoning.

All things will be produced in superior quantity and quality, and with greater ease, when each man works at a single occupation, in accordance with his natural gifts, and at the right moment, without meddling with anything else.