Indeed, intolerance is essential only to monotheism; an only God is by nature a jealous God who will not allow another to live. On the other hand, polytheistic gods are naturally tolerant, they live and let live.

Anyone can squash a bug but all professors of this world couldn't build one.

It is the courage to make a clean breast of it in the face of every question that makes the philosopher.

If a person is stupid, we excuse him by saying that he cannot help it; but if we attempted to excuse in precisely the same way the person who is bad, we should be laughed at.

I constantly saw the false and the bad, and finally the absurd and the senseless, standing in universal admiration and honour.

To call the world God is not to explain it; it is only to enrich our language with a superfluous synonym.

This is the case with many learned persons; they have read themselves stupid.