把无知视为对自由的限制，理由在于它使人做出若看清后果便不会做出的选择。
The ground for taking ignorance to be restrictive of freedom is that it causes people to make choices they would not have made had they seen what their choices involved.
The Tesla Roadster… it’s a two-seater sports car， very high performance…In fact， it’s beat any Ferrari or Aston Martin in acceleration.And it has more than twice the energy efficiency of a Prius.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
音乐是自我的反映。我们只是解释它，然后我们收到支票。
当你真的跌倒时我想让你知道，并请记住：“世间并不存在失败，那不过是生活想让我们换个方向走走罢了，现在当你在人生谷底，那看起来像是失败。”在过去的一年里，这些话支撑着我自己。
In the end, we will remember not the words of our enemies, but the silence of our friends.
创新不是让事情变得更复杂，而是让事情变得更简单可靠。
你知道得越多，痛苦就越多。
没有什么比一项未完成的任务永远悬在那里更令人疲惫的了。
善可以存在于没有恶的情况下，而恶无法在没有善的情况下存在。