The best thing about success is knowing that your work has paid off.

I do not fear computers. I fear the lack of them.

The Milky Way’s black hole is our closest laboratory for studying extreme gravity.

在我看来，如果你或我必须在两种思想或行动之间做出选择，我们应该记住我们的死亡，并努力生活，使我们的死亡不会给世界带来任何快乐。