You can recognize a small truth because its opposite is a falsehood. The opposite of a great truth is another truth.

What is that we human beings ultimately depend on? We depend on our words. We are suspended in language. Our task is to communicate experience and ideas to others.

If you think you understand it, that only shows that you don't know the first thing about it.

Nothing exists until it is measured.

One must always do what one really cannot.

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.

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