Men should strive to think much and know little.

It is greed to do all the talking but not to want to listen at all.

Good breeding in cattle depends on physical health, but in men on a well-formed character.

Raising children is an uncertain thing; success is reached only after a life of battle and worry.

Sweet exists by convention, bitter by convention, color by convention; but in reality atoms and the void alone exist

The brave man is not only he who overcomes the enemy, but he who is stronger than pleasures.

The whole Earth is at the hand of the wise man, since the fatherland of an elevated soul is the Universe.