Train people well enough so they can leave, treat them well enough so they don't want to.
The beauty of mathematics lies in its ability to reveal the hidden structures of reality.
太阳在天空中闪耀,眼前没有一片云彩。
If you want something you've never had, you must be willing to do something you've never done.
人生不是任天堂游戏,你没有重来的机会。
The greatest scientists are the ones who never stop learning.