All other love is extinguished by self-love; beneficence, humanity, justice, philosophy, sink under it.

Happiness is man's greatest aim in life. Tranquility and rationality are the cornerstones of happiness.

The time when most of you should withdraw into yourself is when you are forced to be in a crowd.

Justice is never anything in itself, but in the dealings of men with one another in any place whatever and at any time. It is a kind of compact not to harm or be harmed.

When we say that pleasure is the end, we do not mean the pleasure of the profligate or that which depends on physical enjoyment--as some think who do not understand our teachings, disagree with them, or give them an evil interpretation--but by pleasure we mean the state wherein the body is free from pain and the mind from anxiety.

Vain is the word of a philosopher which does not heal any suffering of man. For just as there is no profit in medicine if it does not expel the diseases of the body, so there is no profit in philosophy either, if it does not expel the suffering of the mind.

I have never wished to cater to the crowd; for what I know they do not approve, and what they approve I do not know.