A great philosophy is not a philosophy without reproach; it is philosophy without fear.

We must always tell what we see. Above all, and this is more difficult, we must always see what we see.

We shall never know how many acts of cowardice have been motivated by the fear of appearing not sufficiently progressive.

Tyranny is always better organized than freedom.

A great philosophy is not a philosophy without reproach; it is philosophy without fear.

It is the essence of genius to make use of the simplest ideas.

Everything begins in mysticism and ends in politics.