Liberation is not deliverance.

The thirst for the Infinite proves infinity.

The poetic element lying hidden in most women is the source of their magnetic attraction.

Nothing is more dangerous than to stop working. It is a habit that can soon be lost, one that is easily neglected and hard to resume. A measure of day-dreaming is a good thing, like a drug prudently used ... But too much submerges and drowns. Woe to the intellectual worker who allows himself to lapse wholly from positive thinking into day-dreaming. He thinks he can easily change back, and tells himself that it is all one. He is wrong! To substitute day-dreaming for thought is to confuse poison with a source of nourishment.

I believe, sir, in all the progress. Air navigation is the result of the oceanic navigation: from water the human has to pass in the air. Everywhere where creation will be breathable to him, the human will penetrate into the creation. Our only limit is life.

Do you know what friendship is... it is to be brother and sister; two souls which touch without mingling, two fingers on one hand.

A language does not become fixed. The human intellect is always on the march, or, if you prefer, in movement, and languages with it.