So I wish to you—I have no more time, so I have just one wish for you—the good luck to be somewhere where you are free to maintain the kind of integrity I have described, and where you do not feel forced by a need to maintain your position in the organization, or financial support, or so on, to lose your integrity. May you have that freedom. May I also give you one last bit of advice: Never say that you'll give a talk unless you know clearly what you're going to talk about and more or less what you're going to say.

I'd say be just like you. I once had someone tell me that I don't remind them of anyone that they ever met. And I took that as a huge compliment, which meant I was original. And so I would suggest to her that she speak her truth with her life, with her own sense of purpose and pursue her dreams.

Study broadly. Don’t specialize too early. Read history. Sooner or later, you’re going to have to specialize, but within the limits that you have to take obligatory courses to get a degree, keep your general education as broad as you can, because you never know what doors are going to open to new opportunities — ten, 15, 20 years down the road — because of changes in science and technology.

My last piece of advice is the one I could have used the most. It took me a long time to learn. And it is this: You are not a slacker if you cut yourself some slack. When I was your age, I didn't believe in vacations. I didn't believe in weekends. I pushed everyone around me to work very long hours. In the early days of Microsoft, my office overlooked the parking lot—and I would keep track of who was leaving early and staying late. But as I got older—and especially once I became a father—I realized there is more to life than work. Don't wait as long as I did to learn this lesson.

It’s how we are made as homo sapiens. We are biologically organized to cover distances on foot. That’s what we did for tens of thousands of years until we started to use horses, of course, until the mechanical age. And I would not call it “walking” because it’s not going out for a stroll or going out for a “power walk” or ambling in your city. It’s “traveling on foot.” You are reading the world, learning the essence of the world.