It’s not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.

I think it would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.

做数学就是探索一个无限的思想景观。