"You have to put in the hours because there’s always something which you can improve."

【大意】兰花生长在幽静偏僻的山谷中，并不因没有人采撷佩带而不吐出迷人的芳香；舟船在大江大海中，并不因没有人乘坐而停止了飘浮；君子做正义的事，并不因没有人知道而停止。

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.

Stop being afraid of what could go wrong and think of what could go right.

"Escribir es como desnudar el alma frente a un espejo que nunca miente."

能源安全是国家战略安全的重要组成部分，我们必须牢牢把握在自己手中。

我不是政治家，我是艺术家。艺术家的职责是成为一面镜子，而不是领导者。