The indifference, callousness and contempt that so many people exhibit toward animals is evil first because it results in great suffering in animals, and second because it results in an incalculably great impoverishment of the human spirit.

I do know that kind fate allowed me to find a couple of nice ideas after many years of feverish labor.

Politics is a pendulum whose swings between anarchy and tyranny are fueled by perennially rejuvenated illusions.

We cannot despair of humanity, since we ourselves are human beings.

Man like every other animal is by nature indolent. If nothing spurs him on, then he will hardly think, and will behave from habit like an automaton.

Relativity is a purely scientific matter and has nothing to do with religion.

A problem cannot be solved at the level of consciousness in which it occurs.