Every church is a stone on the grave of a god-man: it does not want him to rise up again under any circumstances.

The grand style follows suit with all great passion. It disdains to please, it forgets to persuade. It commands. It wills.

The belief in authority is the source of conscience; which is therefore not the voice of God in the heart of man, but the voice of some men in man.

I am one thing, my writings are another.

There is no more dangerous error than that of mistaking the consequence for the cause.

Those people have no real interest in a science who only begin to get excited about it when they themselves have made discoveries in it.

Men should learn to live with the same seriousness with which children play.