The act of birth is the first experience of anxiety, and thus the source and prototype of the affect of anxiety.

If children could, if adults knew.

There is no likelihood of our being able to suppress humanity's aggressive tendencies... Complete suppression of man's aggressive tendencies is not an issue; what we may try is to direct it into a channel other than that of warfare.

Yes, America is gigantic, but a gigantic mistake.

In the depths of my heart I can’t help being convinced that my dear fellow-men, with a few exceptions, are worthless.

I have an infamously low capacity for visualizing relationships, which made the study of geometry and all subjects derived from it impossible for me.

When we attempt to imagine death, we perceive ourselves as spectators.