成功是一段旅程，而不是终点。

年龄不是指你活了多久，而是指你感觉自己有多老。

"Every story is a lie that tells the truth."

有时候最真实的东西反而是你看不见的。

"I always try to put a little bit of humor in my drawings, because I think it makes them more enjoyable."

The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.