The people with the clear heads are the ones who look life in the face, realize that everything in it is problematic, and feel themselves lost. And this is the simple truth: that to live is to feel oneself lost. Those who accept it have already begun to find themselves, to be on firm ground.

Towns are full of people, houses full of tenants, hotels full of guests, trains full of travelers, cafés full of customers, parks full of promenaders, consulting-rooms of famous doctors full of patients, theatres full of spectators, and beaches full of bathers. What previously was, in general, no problem, now begins to be an everyday one, namely, to find room.

The metaphor is perhaps one of man's most fruitful potentialities. Its efficacy verges on magic, and it seems a tool for creation which God forgot inside one of His creatures when He made him. All our faculties keep us within the realm of the real, of what is already there. The most we can do is to combine things or break them up. The metaphor alone furnishes an escape; between the real things, it lets emerge imaginary reefs, a crop of floating islands.

The world is the sum-total of our vital possibilities.

The truth is that no horizon is especially interesting by itself, by virtue of its peculiar content, and that any horizon, wide or narrow, brilliant or dull, varied or monotonous, may possess an interest of its own which merely requires a vital adjustment to be discovered.

History is the science of people.

An idea is a putting truth in check-mate.