Thirty years ago I sat where you sat. I must have listened to some older person share his life experience. But I don't remember a word of it. I can't even tell you who spoke. What I do remember, vividly, is graduation. I'm told you're meant to be excited, perhaps even relieved, and maybe all of you are. I wasn't. I was totally outraged. Here I'd gone and given them four of the best years of my life and this is how they thanked me for it. By kicking me out.

At that moment I was sure of only one thing: I was of no possible economic value to the outside world. I'd majored in art history, for a start. Even then this was regarded as an act of insanity. I was almost certainly less prepared for the marketplace than most of you. Yet somehow I have wound up rich and famous. Well, sort of. I'm going to explain, briefly, how that happened. I want you to understand just how mysterious careers can be, before you go out and have one yourself. I graduated from Princeton without ever having published a word of anything, anywhere. I didn't write for the Prince, or for anyone else. But at Princeton, studying art history, I felt the first twinge of literary ambition. It happened while working on my senior thesis. My adviser was a truly gifted professor, an archaeologist named William Childs. The thesis tried to explain how the Italian sculptor Donatello used Greek and Roman sculpture - which is actually totally beside the point, but I've always wanted to tell someone. God knows what Professor Childs actually thought of it, but he helped me to become engrossed. More than engrossed: obsessed. When I handed it in I knew what I wanted to do for the rest of my life: to write senior theses. Or, to put it differently: to write books.

Then I went to my thesis defense. It was just a few yards from here, in McCormick Hall. I listened and waited for Professor Childs to say how well written my thesis was. He didn't. And so after about 45 minutes I finally said, "So. What did you think of the writing?" "Put it this way" he said. "Never try to make a living at it." And I didn't - not really. I did what everyone does who has no idea what to do with themselves: I went to graduate school. I wrote at nights, without much effect, mainly because I hadn't the first clue what I should write about. One night I was invited to a dinner, where I sat next to the wife of a big shot at a giant Wall Street investment bank, called Salomon Brothers. She more or less forced her husband to give me a job. I knew next to nothing about Salomon Brothers. But Salomon Brothers happened to be where Wall Street was being reinvented—into the place we have all come to know and love. When I got there I was assigned, almost arbitrarily, to the very best job in which to observe the growing madness: they turned me into the house expert on derivatives. A year and a half later Salomon Brothers was handing me a check for hundreds of thousands of dollars to give advice about derivatives to professional investors.

Now I had something to write about: Salomon Brothers. Wall Street had become so unhinged that it was paying recent Princeton graduates who knew nothing about money small fortunes to pretend to be experts about money. I'd stumbled into my next senior thesis. I called up my father. I told him I was going to quit this job that now promised me millions of dollars to write a book for an advance of 40 grand. There was a long pause on the other end of the line. "You might just want to think about that," he said."Why?" "Stay at Salomon Brothers 10 years, make your fortune, and then write your books," he said. I didn't need to think about it. I knew what intellectual passion felt like — because I'd felt it here, at Princeton — and I wanted to feel it again. I was 26 years old. Had I waited until I was 36, I would never have done it. I would have forgotten the feeling.