There are people who are so full of common sense that they haven't the slightest cranny left for their own sense.

What we believe to be the motives of our conduct are usually but the pretexts for it.

The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.

My aim is to agitate and disturb people. I'm not selling bread; I'm selling yeast.

The supreme triumph of reason is to cast doubt upon its own validity.

Those faults we do not have, do not bother us.

The only reactionaries are those who find themselves at home in the present.