今天的美好时光，就是明天的悲伤回忆。

要养活世界，我们必须先学会倾听土地的声音。

L-函数的算术是解开宇宙秘密的关键。

"The best way to predict the future is to invent it."

The key is to stay focused on your own path.

What I want to talk to you about today is the difference between gifts and choices. Cleverness is a gift， kindness is a choice. Gifts are easy -- they're given after all. Choices can be hard. You can seduce yourself with your gifts if you're not careful， and if you do， it'll probably be to the detriment of your choices.