He who does wrong does wrong against himself. He who acts unjustly acts unjustly to himself, because he makes himself bad.

Retire into thyself. The rational principle which rules has this nature, that it is content with itself when it does what is just, and so secures tranquility.

The main thing we were made for is to work with others.

The best sort of revenue is not to be like him who did the injury.

The inner master, when confronted with an obstacle, uses it as fuel, like a fire which consumes things that are thrown into it. A small lamp would be snuffed out, but a big fire will engulf what is thrown at it and burn hotter; it consumes the obstacle and uses it to reach a higher level.

Remember that all things are only opinion and that it is in your power to think as you please.

Be not careless in deeds, nor confused in words, nor rambling in thought.