Scientists are explorers. Philosophers are tourists.

We have this terrible struggle to try to explain things to people who have no reason to want to know.

I am not interested in what today's mathematicians find interesting.

First you guess. Don't laugh, this is the most important step. Then you compute the consequences. Compare the consequences to experience. If it disagrees with experience, the guess is wrong. In that simple statement is the key to science. It doesn't matter how beautiful your guess is or how smart you are or what your name is. If it disagrees with experience, it's wrong. That's all there is to it.

Scientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to use it.

There's plenty of room at the bottom.

To decide upon the answer is not scientific. In order to make progress, one must leave the door to the unknown ajar ajar only.