"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."

I'm not a rapper, I'm a movement.

For the eyes of the world now look into space, to the moon and to the planets beyond, and we have vowed that we shall not see it governed by a hostile flag of conquest, but by a banner of freedom and peace.

没关系，雨水会注满我的湖!如果湖干了，我还可以说：“不要紧，这天气正适合开车兜风……

There is, I believe, in every disposition a tendency to some particular evil, a natural defect, which not even the best education can overcome.