Richard P. Feynman

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.

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

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

Physics is to math what sex is to masturbation.

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 failing.

I learned very early the difference between knowing the name of something and knowing something.

I, a universe of atoms, an atom in the universe.

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

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

Physics isn't the most important thing. Love is.

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

I don't know what's the matter with people: they don't learn by understanding, they learn by some other way — by rote or something. Their knowledge is so fragile

I think it's much more interesting to live not knowing than to have answers which might be wrong. I have approximate answers and possible beliefs and different degrees of uncertainty about different things, but I am not absolutely sure of anything and there are many things I don't know anything about, such as whether it means anything to ask why we're here. I don't have to know an answer. I don't feel frightened not knowing things, by being lost in a mysterious universe without any purpose, which is the way it really is as far as I can tell.