生活要么是一次大胆的冒险，要么什么都不是。

The only way to do great work is to love what you do.

And I hope you will come back here to Harvard 30 years from now and reflect on what you have done with your talent and your energy. I hope you will judge yourselves not on your professional accomplishments alone, but also on how well you have addressed the world's deepest inequities…on how well you treated people a world away who have nothing in common with you but their humanity.

"To love oneself is the beginning of a lifelong romance."

AdS/CFT对应是理解量子引力的有力工具。