There is no such thing as committing adultery with the right woman, at the right time, and in the right way, for it is simply WRONG.

Happiness is prosperity combined with virtue.

A man is the origin of his action.

Nature herself, as has been often said, requires that we should be able, not only to work well, but to use leisure well; for, as I must repeat once again, the first principle of all action is leisure. Both are required, but leisure is better than occupation and is its end.

Every great genius has an admixture of madness.

For though we love both the truth and our friends, piety requires us to honor the truth first.

But a man's best friend is the one who not only wishes him well but wishes it for his own sake (even though nobody will ever know it): and this condition is best fulfilled by his attitude towards himself - and similarly with all the other attributes that go to define a friend. For we have said before that all friendly feelings for others are extensions of a man's feelings for himself.