The philosopher forms his principles on an infinity of particular observations. He does not confuse truth with plausibility, he takes for truth what is true, for false what is false, for doubtful what is doubtful, and probable what is probable. The philosophical spirit is thus a spirit of observation and accuracy.

In order to get as much fame as one's father one has to much more able than he.

I discuss with myself questions of politics, love, taste, or philosophy. I let my mind rove wantonly, give it free rein to followany idea, wise or mad that may present itself. My ideas are my harlots.

My friend, you should blow out your candle in order to find your way more clearly.

Those who fear the facts will forever try to discredit the fact-finders.

The enjoyment of freedom which could be exercised without any motivation would be the real hallmark of a maniac.

Anyone who takes it upon himself, on his private authority, to break a bad law, thereby authorizes everyone else to break the good ones.