数学中最重要的技能是提出正确问题的能力。

"I'm like a kid. I never think about the consequences."

勇气不是没有恐惧，而是战胜恐惧。

We don't inherit the earth from our ancestors; we borrow it from our children. This principle guides every step we take.

对死亡的回避是不健康和异常的，它使生命第二阶段失去目标。