You are also sharp-witted and level-headed to a remarkable degree.

And some day, twenty or thirty years from now, you'll likely be _hard_-headed, but I'll risk that.

By the time you're out of college I shall be wanting a younger man to take hold with me.
There will be plenty of them, but I shall want a good one.

And that is why I make this offer.

It is entirely selfish, and you need not go searching for any philanthropy in it.