The function of thought is to guide action.
The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
We first make our habits, and then our habits make us.
Writing is not just a profession; it is a way of life, a commitment to truth and beauty.
The only person you should try to be better than is the person you were yesterday.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'