The only way for a rich man to be healthy is by exercise and abstinence, to live as if he were poor.
If you thought that science was certain - well, that is just an error on your part.
I would rather have questions that can't be answered than answers that can't be questioned.
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. Work as hard and as much as you want to on the things you like to do the best. Don't think about what you want to be, but what you want to do. Keep up some kind of a minimum with other things so that society doesn't stop you from doing anything at all.
Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.
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.
When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty - some most unsure, some nearly sure, but none absolutely certain.
I try to move people emotionally.
That's part of this industry. It's hard a lot of the time, especially when you get knocked down a lot. There's a lot of criticism and it's always in the back of your mind that you may never work again.
I work out every morning. Only half an hour. I get on the treadmill. That's it. Every morning, I don't care what time. It gets your blood flowing. It gets your adrenaline flowing. I believe in eating well. It's not fanatical. Eat good food. Make sure you've got good vegetables.
Freedom is not a gift which can be enjoyed save by those shown themselves worthy of it.