当我们想到过去时，我们挑选的是美好的事物。我们想相信一切都是那样的。
When we think of the past it's the beautiful things we pick out. We want to believe it was all like that.
宇宙是不对称的，我相信我们所知道的生命是宇宙不对称性的直接结果。
The biggest mistake you can make is thinking you know everything.
Energy independence is not just a goal; it's a necessity for national security.
如果你面对去年的自己不感到尴尬的话，你目前可能学习得不够努力。
Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.
历史是时间写在人类记忆上的一首循环诗。
没有人能避免成为别人认为你是的那个人。