Philosophy of science is about as useful to scientists as ornithology is to birds.

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.

This is not very important what I'm doing. I'm just proving something.

All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.

Don't think about what you want to be, but what you want to do. Keep up some kind of a minimum with other things so that society doesn't stop you from doing anything at all.

A great deal more is known than has been proved.

If you know that you are not sure, you have a chance to improve the situation. I want to demand this freedom for future generations.