历史不会长期将自由的维护托付给软弱或胆怯的人。
我们需要世界上的思想多样性来面对新的挑战。
事情不一定要改变世界才能变得重要。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
生活是一系列的时刻,有些好,有些坏,但都很重要。
I was so much older then, I'm younger than that now.