When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is in some doubt.

Everything is made of atoms.

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.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Science is a way for us to not fool ourselves.

I have the advantage of having found out how hard it is to get to really know something. How careful you have to be about checking your experiments. How easy it is to make mistakes and fool yourself. I know what it means to know something.

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.