风险管理不是回避挑战，而是明智地应对它们。

She realized that sometimes, the hardest thing to do is to let go.

Patience is a virtue, and I'm learning patience. It's a tough lesson.

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.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.