If you aren't confused by quantum mechanics, you haven't really understood it.

In physics we deal with states of affairs much simpler than those of psychology and yet we again and again learn that our task is not to investigate the essence of things-we do not at all know what this would mean&mash;but to develop those concepts that allow us to speak with each other about the events of nature in a fruitful manner.

Anyone not shocked by quantum mechanics has not yet understood it.

There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.

If we couldn't laugh at ourselves, that would be the end of everything.

Every valuable human being must be a radical and a rebel, for what he must aim at is to make things better than they are.

If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.