When I was a fairly precocious young man I became thoroughly impressed with the futility of the hopes and strivings that chase most men restlessly through life. Moreover, I soon discovered the cruelty of that chase, which in those years was much more carefully covered up by hypocrisy and glittering words than is the case today. By the mere existence of his stomach everyone was condemned to participate in that chase. The stomach might well be satisfied by such participation, but not man insofar as he is a thinking and feeling being.

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.

You can't blame gravity for falling in love.

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing...

The formulation of the problem is often more essential than its solution, which may be merely a matter of mathematical or experimental skill.

This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.

Opinions about obviousness are to a certain extent a function of time.