希望是人类最美好的拥有，只要自己不放弃，希望就会永远相伴相随。

"The past is a foreign country; they do things differently there."

老年人相信每一件事物；中年人猜疑每一件事物；青年人什么都懂。

The only thing that can save the world is the awakening of humanity.

Everything can be taken from a man but one thing: the last of the human freedoms—to choose one's attitude in any given set of circumstances.

General relativity has passed every test we’ve thrown at it, even near a supermassive black hole.