If it's time for you to go, leave willingly - as you would to accomplish anything that can be done with grace and honor.

Failure to read what is happening in another's soul is not easily seen as a cause of unhappiness: but those who fail to attend the motions of their own soul are necessarily unhappy.

Take care that you entertain no notions unsuitable to virtue and reasonable nature.

From the philosopher Catulus, never to be dismissive of a friend's accusation, even if it seems unreasonable, but to make every effort to restore the relationship to its normal condition.

So much worse are the consequences of anger than its causes.

Never value anything as profitable to thyself which shall compel thee to break thy promise, to lose thy self-respect, to hate any man, to suspect, to curse, to act the hypocrite, to desire anything which needs walls and curtains.

Death, like birth, is a secret of Nature.