The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

I'm not happy on vacation. In those rare times when I have three hours with no work I have to do, I'm terribly uncomfortable.

I've been a lucky boy.

One of the things that makes our military the best in the world is the certain knowledge of each soldier, sailor, airman, and Marine that they can always count on their comrades should they need help - that they will never be abandoned.