There's only one thing more important... and that is, after you've done what you set out to do, to feel that it's been worth doing.

The right mixture of caring and not caring - I suppose that's what love is.

The first quarter-century of your life was doubtless lived under the cloud of being too young for things, while the last quarter-century would normally be shadowed by the still darker cloud of being too old for them; and between those two clouds, what small and narrow sunlight illumines a human lifetime!

And I believe that the Binomial Theorem and a Bach Fugue are, in the long run, more important than all the battles of history.

Laziness in doing stupid things can be a great virtue.

There are times in life when the most comfortable thing is to do nothing at all. Things happen to you and you just let them happen.

There's only one thing more important... and that is, after you've done what you set out to do, to feel that it's been worth doing.