Appear to know only this--never to fail nor fall.

Nothing is in reality either pleasant or unpleasant by nature but all things become so through habit

Bid a singer in a chorus, Know Thyself; and will he not turn for the knowledge to the others, his fellows in the chorus, and to his harmony with them?

To get or not to get what we desire can be equally disappointing.

Be free from grief not through insensibility like the irrational animals, nor through want of thought like the foolish, but like a man of virtue by having reason as the consolation of grief.

It is impossible to begin to learn that which one thinks one already knows.

Never in any case say I have lost such a thing, but I have returned it. Is your child dead? It is a return. Is your wife dead? It is a return. Are you deprived of your estate? Is not this also a return?