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.

Always plan for the worst-case scenario.

失去某人，最糟糕的莫过于，他近在身旁，却犹如远在天边。

Years of love have been forgot, In the hatred of a minute.

The greatest battles are not fought with weapons, but with ideas.

在和平时期，儿子埋葬父亲。在战争中，父亲埋葬儿子。