Then there are the fanatical atheists whose intolerance is of the same kind as the intolerance of the religious fanatics and comes from the same source.

A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended its area of applicability.

I believe that whoever tries to think things through honestly will soon recognize how unworthy and even fatal is the traditional bias against Negroes. What can the man of good will do to combat this deeply rooted prejudice? He must have the courage to set an example by words and deed, and must watch lest his children become influenced by racial bias.

The true measure of a man is the degree to which he has managed to subjugate his ego.

I have always loved solitude, a trait which tends to increase with age.

I am neither especially clever nor especially gifted. I am only very, very curious.

Anyone who thinks science is trying to make human life easier or more pleasant is utterly mistaken.