The existence of the natural world is the same kind of fact as the existence of any proposition.

It is no use doing what you like;you have got to like what you do.

质量不是一种行为，而是一种习惯。

I’ve always been an optimist and I suppose that is rooted in my belief that the power of creativity and intelligence can make the world a better place.

I think if you do something and it turns out pretty good, then you should go do something else wonderful, not dwell on it for too long. Just figure out what's next.