When a man is proud because he can understand and explain the writings of Chrysippus, say to yourself, 'if Chrysippus had not written obscurely, this man would have had nothing to be proud of.'

It doesn't take much to lose everything, just a little departure from reason

What is learned without pleasure is forgotten without remorse.

First say to yourself what you would be; and then do what you have to do.

Don't regard what anyone says of you, for this, after all, is no concern of yours.

Men are not troubled by things themselves, but by their thoughts about them

God has entrusted me with myself. No man is free who is not master of himself. A man should so live that his happiness shall depend as little as possible on external things. The world turns aside to let any man pass who knows where he is going.