 What does the older man plan to do after this event?
There is one fact no sane man can quarrel with ... But some men aren't sane; thus it isn't always so! I'm not your father's ghost, even if I do look a bit like him. You will, you know, so why quibble about it? At least, you always have ... or do ... or will. You'll get used to it, of course, but it will take about thirty years. You're wondering whether to give me a drink, as I remember it. And naturally, since we have the same tastes, you can make the same for me as you're having. I'm you thirty years from now, or you're me. I remember just how you feel; I felt the same way when he—that is, of course, I or we—came back to tell me about it, thirty years ago. And you can look at the revenue stamp date, if you still doubt my story. It's a real wrench when a man meets himself for the first time. So I'll simply go ahead talking for half an hour or so, until you get over it. You know, I could try to change things around by telling what happened to me; but he—I—told me what I was going to do, so I might as well do the same. So let's begin when you get up in half an hour and come out with me. Yes, it'll be pretty obvious it must be a time machine. You'll be puzzling over what I'll tell you, and you'll be getting used to the idea that you are the man who makes atomic power practical. You won't exactly believe it, but you'll want to go along. You can see a sort of foggy nothing surrounding the cockpit; it is probably the field that prevents passage through time from affecting us. You start to say something, but by then I'm pressing a black button, and everything outside will disappear. You are completely outside of time and space, as best you can guess how things are. Doesn't hurt, and when you pull your arm back, you're still sound and uninjured. Then it comes to you slowly that you're actually traveling in time. Then you feel silly, because you'll remember that I said you'd ask that. "Maybe it's no dimension—or it might be the fifth; if you're going to skip over the so-called fourth without traveling along it, you'd need a fifth.
 retire
 retire  grow his company and make more money  go to another dimension  travel back in time again