最大的风险就是不冒任何风险。

The deeper you go into mathematics, the more you realize how much remains unknown.

最简单的图画往往能承载最深刻的情感。

If you can't fly then run， if you can't run then walk， if you can't walk then crawl， but whatever you do you have to keep moving forward.

有志之士珍惜每一年的光阴；贤德之人，珍惜每一天的光阴；而圣人则会珍惜每一寸的光阴。