As the soil, however rich it may be, cannot be productive without cultivation, so the mind without culture can never produce good fruit

The worst evil of all is to leave the ranks of the living before one dies.

Man is a social animal.

There is no easy way from the earth to the stars.

There is about wisdom a nobility and magnificence in the fact that she doesn't just fall to a person's lot, that each man owes her to his own efforts, that one doesn't go to anyone other than oneself to find her.

He who forbids not sin when he may, commands it

Humanity is fortunate, because no man is unhappy except by his own fault.