The only way to escape the corruptible effect of praise is to go on working.

But love brings much happiness - much more so than pining brings pain.

Every day, man is making bigger and better fool-proof things, and every day, nature is making bigger and better fools. So far, I think nature is winning.

He who cherishes the value of cultures cannot fail to be a pacifist.

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 am a determinist. As such, I do not believe in free will. The Jews believe in free will. They believe that man shapes his own life. I reject that doctrine philosophically. In that respect I am not a Jew.

Peace cannot be kept by force; it can only be achieved by understanding.