真正的乐趣在于发现而不是知道。
The true delight is in the finding out rather than in the knowing.
实现明天理想的唯一障碍是今天的疑虑。
The supreme question about a work of art is out of how deep a life does it spring.
The only way to learn mathematics is to do mathematics.
在远处防守不如在近处防守，把守太繁琐不如把守要塞，用常法把守不如用出奇制胜的方法，把守宽阔的地方不如把守狭窄的地方，在深处把守不如在浅处把守。
And when they leave,they take your life of details with them. You are expected to move on again, but you don't remember what it was that moved you, because no one's asked you in so long. Not even yourself.