I've been waiting more than 30 years to say this: "Dad, I always told you I'd come back and get my degree." I want to thank Harvard for this timely honor. I'll be changing my job next year…and it will be nice to finally have a college degree on my resume.

Happiness is beneficial for the body, but it is grief that develops the powers of the mind.

如果你回溯几百年，我们今天认为理所当然的事情会像魔法一样——能够远距离与人交谈、传输图像、飞行、像先知一样访问大量数据。这些都是几百年前会被视为魔法的事情。