Bear in mind that the measure of a man is the worth of the things he cares about. If it is good to say or do something, then it is even better to be criticized for having said or done it.

Ambition means tying your well-being to what other people say or do. Self-indulgence means tying it to the things that happen to you. Sanity means tying it to your own actions.

Frequently consider the connection of all things in the universe. .. We should not say 'I am an Athenian' or 'I am a Roman' but 'I am a citizen of the Universe.

Remember that all is opinion.

Do what you will. Even if you tear yourself apart, most people will continue doing the same things.

This is the mark of a perfect character - to pass through each day as though it were the last, without agitation, without torpor, and without pretense.

Whosoever does wrong, wrongs himself; whosoever does injustice, does it to himself, making himself evil.