A man should practice what he preaches, but a man should also preach what he practices.

Because the newer methods of treatment are good, it does not follow that the old ones were bad: for if our honorable and worshipful ancestors had not recovered from their ailments, you and I would not be here today.

Respect the gods, but have as little to do with them as possible.

Learn, as if never overtaking your object, and yet as if apprehensive of losing it.

When you locate good in yourself, approve of it with determination. When you locate evil in yourself, despise it as something detestable.

These are the four abuses: desire to succeed in order to make oneself famous; taking credit for the labors of others; refusal to correct one's errors despite advice; refusal to change one's ideas despite warnings.

When you see a good man, try to emulate his example, and when you see a bad man, search yourself for his faults.