Your smarts will come in handy because you will travel in a land of marvels. We humans -- plodding as we are -- will astonish ourselves. We'll invent ways to generate clean energy and a lot of it. Atom by atom， we'll assemble tiny machines that will enter cell walls and make repairs. This month comes the extraordinary but also inevitable news that we've synthesized life. In the coming years， we'll not only synthesize it， but we'll engineer it to specifications. I believe you'll even see us understand the human brain. Jules Verne， Mark Twain， Galileo， Newton -- all the curious from the ages would have wanted to be alive most of all right now. As a civilization， we will have so many gifts， just as you as individuals have so many individual gifts as you sit before me.

I don't believe in poverty. I believe in creating opportunities.

Physics is not just a science, it is a way of thinking about the world.

永远年轻，永远热泪盈眶。

The act of making art is an act of hope.

树木有根则繁茂，根腐则树枯萎；鱼有水才能活，水干涸了鱼则必死；灯有油才光亮，油尽则灯灭。人有真精神，保护则长寿，戕害则必死。

活着是世界上最稀有的事情。大多数人只是存在，仅此而已。