最好的想法来自那些最接近问题的人。
游戏是儿童的工作。
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.
In mathematics, the art of proposing a question must be held of higher value than solving it.
Fear bound your heart and hope to release your heart.