I think we can safely assume that no one understands quantum mechanics.

We cannot define anything precisely. If we attempt to, we get into the paralysis of thought that comes to philosophers, who sit opposite each other, one saying to the other, "You don't know what you are talking about!" The second one says, "What do you mean by know? What do you mean by talking? What do you mean by you?"

What Do You Care What Other People Think?

If all of mathematics disappeared, physics would be set back by exactly one week.

Philosophers say a great deal about what is absolutely necessary for science, and it is always, so far as one can see, rather naive, and probably wrong.

Mathematics is a language plus reasoning. It's like a language plus logic. Mathematics is a tool for reasoning.

We have found it of paramount importance that in order to progress, we must recognize our ignorance and leave room for doubt.