Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

Good science requires both creativity and discipline.

To understand art is to understand life.

The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!

在一个充满仇恨的世界里，我们仍然要敢于希望。在一个充满愤怒的世界里，我们仍然要敢于安慰。在一个充满绝望的世界里，我们仍然要敢于梦想。在一个充满怀疑的世界里，我们仍然要敢于相信。