642 Quotes by Richard P. Feynman

It is in the admission of ignorance and the admission of uncertainty that there is a hope for the continuous motion of human beings in some direction that doesn’t get confined, permanently blocked, as it has so many times before in various periods in the history of man.

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

If you thought that science was certain – well, that is just an error on your part.

This attitude of mind – this attitude of uncertainty – is vital to the scientist, and it is this attitude of mind which the student must first acquire. It becomes a habit of thought. Once acquired, we cannot retreat from it anymore.

The first principle is that you must not fool yourself – and you are the easiest person to fool. So you have to be very careful about that. After you’ve not fooled yourself, it’s easy not to fool other scientists. You just have to be honest in a conventional way after that.

I’m smart enough to know that I’m dumb.

If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar.

It’s because somebody knows something about it that we can’t talk about physics. It’s the things that nobody knows anything about we can discuss.

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn’t matter.