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There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.

"To write is to struggle and to resist; to write is to become; to write is to draw a map of the world that has not yet been explored."

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.

In the energy sector, collaboration is key to solving the complex challenges we face.

外交不是零和游戲，而是尋找共同利益的藝術。

我們的人生如同被講述的故事一樣度過。

True innovation comes from understanding the unmet needs of consumers and having the courage to act on them.