If man has one good memory to go by, that may be enough to save him.

One can tell a child everything, anything. I have often been struck by the fact that parents know their children so little. They should not conceal so much from them. How well even little children understand that their parents conceal things from them, because they consider them too young to understand! Children are capable of giving advice in the most important matters.

There is nothing easier than lopping off heads and nothing harder than developing ideas.

Man is tormented by no greater anxiety than to find someone quickly to whom he can hand over that great gift of freedom with which the ill-fated creature is born.

Happiness does not lie in happiness, but in the achievement of it.

Life [had] replaced logic.

If the spirit has passed through a great many sensations, possibly it can no longer be sated with them, but grows more excited, and demands more sensations, and stronger and stronger ones, until at length it falls exhausted.