互相有爱意，交往中也相互得利。这是墨子很典型的思想主张，也是墨家学派对人类社会最美好的期望。

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 ultimate goal of machine learning is to make machines that can learn from experience and improve their performance over time.

The darkest nights produce the brightest stars.

Human kindness has never weakened the stamina or softened the fiber of a free people. A nation does not have to be cruel to be tough.