数学的本质不是把简单的事情复杂化，而是把复杂的事情简单化。

If your tanning process wouldn't withstand a documentary film crew, it's time to rethink your methods.

The task of the teacher is to lead the student from the known to the unknown.

It's easier to ask forgiveness than it is to get permission.

目标是灵魂，目标是捕捉正确的感觉。

发散级数是魔鬼的发明，基于它们的任何证明都是一种耻辱。