Nobody knows how the stand of our knowledge about the atom would be without him. Personally, [Niels] Bohr is one of the amiable colleagues I have met. He utters his opinions like one perpetually groping and never like one who believes himself to be in possession of the truth.

I am strongly drawn to a frugal life and am often oppressively aware that I am engrossing an undue amount of the labor of my fellow men.

I thought of that while riding my bicycle.

It takes a different kind of thinking to solve a problem than the kind of thinking which produced the problem.

The further the spiritual evolution of mankind advances, the more certain it seems to me that the path to genuine religiosity does not lie through the fear of life, and the fear of death, and blind faith, but through striving after rational knowledge.

One is born into a herd of buffaloes and must be glad if one is not trampled under foot before one's time.

If you want your children to be intelligent, read them fairy tales. If you want them to be more intelligent, read them more fairy tales.