I hope that in this year to come, you make mistakes. Because if you are making mistakes, then you are making new things, trying new things, learning, living, pushing yourself, changing yourself, changing your world. You're doing things you've never done before, and more importantly, you're doing something.

The best technologies fail without the right people to implement them.

Be the change you wish to see in the world.

有时我们为某些事感到悲伤，却不愿告诉别人。我们想保守这个秘密。或者有时我们感到悲伤，却真的不知道为什么悲伤，于是我们说我们不悲伤，但实际上我们是悲伤的。

In mathematics, as in life, the most elegant solutions often arise from a deep understanding of the problem.

你不应该认为对你来说难以掌握的东西是不可能的，如果是人类可以实现的，就应该认为它是可以实现的。

Coal keeps America competitive in the world.

Never stop learning, because the world never stops changing.