I now tell the story with a smile because it’s all worked out just fine, and I look back and I laugh. But through all of these peregrinations, through different fields and random walks, I was very frequently depressed about all of it, and deeply worried about this. After all, world class math student, a Rhodes scholar, won thesis prizes in mathematics. I had a great career prospect to go ahead and do pure mathematics. I discarded all of that and I wasn’t sure what for, and I recriminated often about that. I worried deeply about it, that I would never really have a good position in a university, or doing anything else for that matter. So anybody who imagines that you make these transitions without tremendous agonizing is absolutely wrong. I tell the story with a laugh today, but certainly it’s a very painful thing to be searching around like that, and not knowing what you really want to do. Eventually, you make enough transitions that you realize that life is about making those transitions. I still doubt I made them very gracefully. I reckon I have a few more career changes left in me, and I don’t imagine I’m going to do them completely gracefully. I hope, for the sake of my wife and my kids, I do them more gracefully than the ones I’ve done up to now, and worry maybe a little bit less, but you take these seriously. You throw yourself into them and they matter a lot, and somehow there’s great internal turmoil as you reinvent yourself and find out what you really want to do. What you have to do is balance it with a lot of fun along the way, but I would certainly be wrong to say that the whole thing was easy. It certainly, I don’t think, looks easy in retrospect, and it certainly wasn’t easy. What I was very blessed by was wonderful people to do it with, and wonderful help.