No man is rich who is unsatisfied, but who wants nothing possess his heart's desire.

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

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.

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

Some things that satisfy the rules of algebra can be interesting to mathematicians even though they don't always represent a real situation.

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. There are many things I don't know anything about, such as whether it means anything to ask "Why are we here?" I might think about it a little bit, and if I can't figure it out then I go on to something else. But I don't have to know an answer. I don't feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose - which is the way it really is, as far as I can tell.

I love only nature, and I hate mathematicians.