True knowledge exists in knowing that you know nothing. And in knowing that you know nothing, that makes you the smartest of all.

Envy is the ulcer of the soul.

Do you suppose that I should have lived as long as I have if I had moved in the sphere of public life, and conducting myself in that sphere like an honorable man, had always upheld the cause of right, and conscientiously set this end above all other things? Not by a very long way, gentlemen; neither would any other man.

The easiest and noblest way is not to be crushing others, but to be improving yourselves.

Do not go through life like leaf blown from here to there believing whatever you are told.

Fear of women love more than hate the man.

To find yourself, think for yourself.