There is nothing like a dream to create the future.

A man is not idle because he is absorbed in thought. There is a visible labor and there is an invisible labor.

Hope is a delusion; no hand can grasp a wave or a shadow.

A saint addicted to excessive self-abnegation is a dangerous associate; he may infect you with poverty, and a stiffening of those joints which are needed for advancement-in a word, with more renunciation than you care for-and so you flee the contagion.

He never went out without a book under his arm, and he often came back with two.

Nothing is really small; whoever is open to the deep penetration of nature knows this.

In this world, which is so plainly the antechamber of another, there are no happy men. The true division of humanity is between those who live in light and those who live in darkness. Our aim must be to diminish the number of the latter and increase the number of the former. That is why we demand education and knowledge.