Happiness is a virtue, not its reward.
All things excellent are as difficult as they are rare.
Sin cannot be conceived in a natural state, but only in a civil state, where it is decreed by common consent what is good or bad.
So long as a man imagines that he cannot do this or that, so long as he is determined not to do it; and consequently so long as it is impossible to him that he should do it.
Blessedness is not the reward of virtue but virtue itself.
Nothing exists from whose nature some effect does not follow.
Be not astonished at new ideas; for it is well known to you that a thing does not therefore cease to be true because it is not accepted by many.
Self-complacency is pleasure accompanied by the idea of oneself as cause.