Ambition means tying your well-being to what other people say or do. Self-indulgence means tying it to the things that happen to you. Sanity means tying it to your own actions.

From Alexander the Platonic, not frequently nor without necessity to say to any one, or to write in a letter, that I have no leisure; nor continually to excuse the neglect of duties required by our relation to those with whom we live, by alleging urgent occupations.

He who does wrong does wrong against himself. He who acts unjustly acts unjustly to himself, because he makes himself bad.

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.

The first rule is to keep an untroubled spirit. The second is to look things in the face and know them for what they are.

Love the people with whom fate brings you together

In an expression of true gratitude, sadness is conspicuous only by its absence