Friendship is given us by nature, not to favor vice, but to aid virtue.
The wise man knows nothing if he cannot benefit from his wisdom. Wisdom is not only to be acquired, but also to be utilized.
The first duty of man is the seeking after and the investigation of truth.
This is a proof of a well-trained mind, to rejoice in what is good and to grieve at the opposite.
Honor is the reward of virtue.
Democritus maintains that there can be no great poet without a spite of madness.