我的生命是有限的，而知识是无限的。用有限的生命去追求无限的知识，是很危险的！

"The world is full of obvious things which nobody by any chance ever observes."

A good ad should be like a good sermon; it must not only comfort the afflicted, but also afflict the comfortable.

I don't really think about age. I think people are as old as they feel and act.