把员工培训得足够好，他们可以离开；对他们足够好，他们就不想离开。
Train people well enough so they can leave, treat them well enough so they don't want to.
The self is nothing else than the sum of all the contents of consciousness.
最危险的监狱是我们建在脑海中的那些。
The world is all the richer for having a devil in it, so long as we keep our foot upon his neck.
In the realm of mathematics, every problem is an opportunity to discover something new and profound.
在数学的领域里，每一个问题都是发现新事物和深刻见解的机会。
最好的数学是永恒的。