(Joan,1941) She wrote me a letter asking,"How can I read it?,Its so hard." I told her to start at the beginning and read as far as you can get until you're lost. Then start again at the beginning and keep working through until you can understand the whole book. And thats what she did

There is enough energy in a single cubic meter of space to boil all the oceans in the world.

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.

Strange! I don't understand how it is that we can write mathematical expressions and calculate what the thing is going to do without being able to picture it.

If all of mathematics disappeared, physics would be set back by exactly one week.

We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.

All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.