人生的大悲剧不是死亡,而是停止去爱。
The great tragedy of life is not that men perish, but that they cease to love.
不要等待别人的许可去做出改变。
We are all walking around with an evolutionary user's manual in our heads, but most people don't realize it.
When you live for others' opinions, you are dead.
数学中最深刻的见解往往来自最抽象的理论。