Richard Feynman

I think I can safely say that nobody understands quantum mechanics.

What I cannot create, I do not understand.

The pleasure of finding things out is one of the greatest pleasures in life.

I would rather have questions that can't be answered than answers that can't be questioned.

Science is the belief in the ignorance of experts.

Nature uses only the longest threads to weave her patterns, so that each small piece of her fabric reveals the organization of the entire tapestry.

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.

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

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply enough.

You have no responsibility to live up to what other people think you ought to accomplish. I have no responsibility to be like they expect me to be. It's their mistake, not my problem.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

The highest forms of understanding we can achieve are laughter and human compassion.

I learned from her that every woman is worried about her looks, no matter how beautiful she is.

Poets say science takes away from the beauty of the stars – mere glimmers of gas particles. But I think it adds. Knowing a little about them makes them so much more interesting.

I'd hate to die twice. It's so boring.

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

If you expected the world to be fair, you would be constantly disappointed.

The only function of economic forecasting is to make astrology look respectable.

We are at the very beginning of time for the human race. It is not unreasonable that we struggle to come to terms with this reality.

Religion is a culture of faith; science is a culture of doubt.