自由意味着责任,因此许多人害怕自由。
Courage is not the absence of fear, but the triumph over it.
数学的力量在于它的抽象性,使我们能够看到不立即显现的模式和联系。
我们必须相信自己天生适合做某事,无论付出什么代价,都必须实现这一目标。
I don't care what people say about me as long as it isn't true.