An education which does not cultivate the will is an education that depraves the mind.

Play is hand-to-hand encounter with Fate.

It is only the poor who pay cash, and that not from virtue, but because they are refused credit.

The power of love itself weakens and gradually becomes lost with age, like all the other energies of man.

It is almost impossible systematically to constitute a natural moral law. Nature has no principles. She furnishes us with no reason to believe that human life is to be respected. Nature, in her indifference, makes no distinction between good and evil.

The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.

Dog! When we first met on the highway of life, we came from the two poles of creation.... What can be the meaning of the obscure love for me that has sprung up in your heart?