Richard Feynman

The important thing is not to stop questioning. Curiosity has its own reason for existence.

From The Feynman Lectures on Physics

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

From The Feynman Lectures on Physics

The beauty of a flower is not in its color but in its simplicity.

From The Feynman Lectures on Physics

It is the theory that decides what we can observe.

From The Feynman Lectures on Physics

The universe is a big place, perhaps the biggest.

From The Feynman Lectures on Physics

There is a law in physics that says that you cannot create or destroy energy.

From The Feynman Lectures on Physics

The most important thing is to keep the most important thing the most important thing.

From The Feynman Lectures on Physics

Physics is like sex: sure, it may give some practical results, but that’s not why we do it.

From The Feynman Lectures on Physics

What I cannot create, I do not understand.

From The Feynman Lectures on Physics

The first principle is that you must not fool yourself—and you are the easiest person to fool.

From The Feynman Lectures on Physics