The individual point of view is the only point of view from which one is able to look at the world in its truth.

Human vitality is so exuberant that in the sorriest desert it still finds a pretext for glowing and trembling.

Hating someone is feeling irritation by their mere existence.

Rancor is an outpouring of a feeling of inferiority.

Civilization is nothing more than the effort to reduce the use of force to the last resort.

Our firmest convictions are apt to be the most suspect; they mark our limitations and our bounds. Life is a petty thing unless it is moved by the indomitable urge to extend its boundaries.

The man who discovers a new scientific truth has previously had to smash to atoms almost everything he had learnt, and arrives at the new truth with hands blood stained from the slaughter of a thousand platitudes.