So why is reading books any better than reading tweets or wall posts? Well, sometimes it isn’t. Sometimes, you need to put down your book, if only to think about what you’re reading, what you think about what you’re reading. But a book has two advantages over a tweet. First, the person who wrote it thought about it a lot more carefully. The book is the result of his solitude, his attempt to think for himself. Second, most books are old. This is not a disadvantage: this is precisely what makes them valuable. They stand against the conventional wisdom of today simply because they’re not from today. Even if they merely reflect the conventional wisdom of their own day, they say something different from what you hear all the time. But the great books, the ones you find on a syllabus, the ones people have continued to read, don’t reflect the conventional wisdom of their day. They say things that have the permanent power to disrupt our habits of thought. They were revolutionary in their own time, and they are still revolutionary today. And when I say “revolutionary,” I am deliberately evoking the American Revolution, because it was a result of precisely this kind of independent thinking. Without solitude—the solitude of Adams and Jefferson and Hamilton and Madison and Thomas Paine—there would be no America. So solitude can mean introspection, it can mean the concentration of focused work, and it can mean sustained reading. All of these help you to know yourself better. But there’s one more thing I’m going to include as a form of solitude, and it will seem counterintuitive: friendship. Of course friendship is the opposite of solitude; it means being with other people. But I’m talking about one kind of friendship in particular, the deep friendship of intimate conversation. Long, uninterrupted talk with one other person. Not Skyping with three people and texting with two others at the same time while you hang out in a friend’s room listening to music and studying. That’s what Emerson meant when he said that “the soul environs itself with friends, that it may enter into a grander self-acquaintance or solitude.” Introspection means talking to yourself, and one of the best ways of talking to yourself is by talking to another person. One other person you can trust, one other person to whom you can unfold your soul. One other person you feel safe enough with to allow you to acknowledge things—to acknowledge things to yourself—that you otherwise can’t. Doubts you aren’t supposed to have, questions you aren’t supposed to ask. Feelings or opinions that would get you laughed at by the group or reprimanded by the authorities. This is what we call thinking out loud, discovering what you believe in the course of articulating it. But it takes just as much time and just as much patience as solitude in the strict sense. And our new electronic world has disrupted it just as violently. Instead of having one or two true friends that we can sit and talk to for three hours at a time, we have 968 “friends” that we never actually talk to; instead we just bounce one-line messages off them a hundred times a day. This is not friendship, this is distraction. I know that none of this is easy for you. Even if you threw away your cell phones and unplugged your computers, the rigors of your training here keep you too busy to make solitude, in any of these forms, anything less than very difficult to find. But the highest reason you need to try is precisely because of what the job you are training for will demand of you. You’ve probably heard about the hazing scandal at the U.S. naval base in Bahrain that was all over the news recently. Terrible, abusive stuff that involved an entire unit and was orchestrated, allegedly, by the head of the unit, a senior noncommissioned officer. What are you going to do if you’re confronted with a situation like that going on in your unit? Will you have the courage to do what’s right? Will you even know what the right thing is? It’s easy to read a code of conduct, not so easy to put it into practice, especially if you risk losing the loyalty of the people serving under you, or the trust of your peer officers, or the approval of your superiors. What if you’re not the commanding officer, but you see your superiors condoning something you think is wrong? How will you find the strength and wisdom to challenge an unwise order or question a wrongheaded policy? What will you do the first time you have to write a letter to the mother of a slain soldier? How will you find words of comfort that are more than just empty formulas? These are truly formidable dilemmas, more so than most other people will ever have to face in their lives, let alone when they’re 23. The time to start preparing yourself for them is now. And the way to do it is by thinking through these issues for yourself—morality, mortality, honor—so you will have the strength to deal with them when they arise. Waiting until you have to confront them in practice would be like waiting for your first firefight to learn how to shoot your weapon. Once the situation is upon you, it’s too late. You have to be prepared in advance. You need to know, already, who you are and what you believe: not what the Army believes, not what your peers believe (that may be exactly the problem), but whatyou believe. How can you know that unless you’ve taken counsel with yourself in solitude? I started by noting that solitude and leadership would seem to be contradictory things. But it seems to me that solitude is the very essence of leadership. The position of the leader is ultimately an intensely solitary, even intensely lonely one. However many people you may consult, you are the one who has to make the hard decisions. And at such moments, all you really have is yourself.