I want my fans to know how much I appreciate them. I wouldn't be here without them.

The only limit to our realization of tomorrow will be our doubts of today.

And when you do I want you to know this， remember this: there is no such thing as failure. Failure is just life trying to move us in another direction. Now when you’re down there in the hole， it looks like failure. So this past year I had to spoon feed those words to myself.

凡事天下要考察有无的原则,必定是以众人的耳目所见所闻的实情以知有与无来作为标准的。

科学的美丽在于它能够将抽象转化为具体。