He who has heard the same thing told by 12,000 eye-witnesses has only 12,000 probabilities, which are equal to one strong probability, which is far from certain.

The only way to comprehend what mathematicians mean by Infinity is to contemplate the extent of human stupidity.

It is not sufficient to see and to know the beauty of a work. We must feel and be affected by it.

He who dies before many witnesses always does so with courage.

Optimism is the madness of insisting that all is well when we are miserable.

The monster, fanaticism, still exists, and whoever seeks after truth will run the risk of being persecuted.

Prejudices are what fools use for reason.