The pride of youth is in strength and beauty, the pride of old age is in discretion.
By desiring little, a poor man makes himself rich.
Do not trust all men, but trust men of worth; the former course is silly, the latter a mark of prudence.
Our sins are more easily remembered than our good deeds.
Tis hard to fight with anger, but the prudent man keeps it under control.
Nothing exists except atoms and empty space; everything else is opinion.
I would rather discover one scientific fact than become King of Persia.