The purpose of computing is insight, not numbers.
Richard Hamming
If you want to think new thoughts that are different, then do what creative people do - get the problem reasonably clear and then refuse to look at any answers until you've thought the problem through carefully how you would do it, how you could slightly change the problem to be the correct one.
Richard Hamming
If you don't work on important problems, it's not likely that you'll do important work.
Richard Hamming
If you have the door to your office closed, you get more work done today and tomorrow, and you are more productive than most. But ten years later somehow, you don't quite know what problems are worth working on.