Nothing is more dangerous than an idea when it is the only one you have.

Nothing is more dangerous then having just one idea

Every idea I get I have to deny, that's my way of testing it.

We prove what we want to prove, and the real difficulty is to know what we want to prove.

There are only two kinds of scholars; those who love ideas and those who hate them.

Penser, c'est aller d'erreur en erreur.

Ma grande objection à l’argent, c’est que l’argent est bête.