Every challenge is an opportunity in disguise.
如果你出生贫穷，那不是你的错。但如果你死时仍然贫穷，那就是你的错。
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
In the realm of mathematics, every problem is an opportunity to discover something new and profound.