To succeed in science, one must doubt; to succeed in life, one must be sure.

The altruism of foresters can serve as a motto for humanity in general: "We reap what we have not sown. We sow what we do not reap."

The paradox is the seed of truth. This germ just needs a fertile ground to flourish and bear fruit.

To succeed in science, one must doubt; to succeed in life, one must be sure.

La vérité est sur une courbe dont notre ésprit suit éternellement l'asymptote. Truth is on a curve whose asymptote our spirit follows eternally.

What are we doing down here? We prepare the blossoms of tomorrow. We all manure future humanity.

"Genius is just enduring patience," said Buffon. This is far from complete. Genius is impatience in ideas and patience with the facts: a lively imagination and a calm judgment, rather like a liquid boiling in a cup that remains cold.