Jeeves and the Unbidden Guest — P.G. Wodehouse

I'm not absolutely certain of my facts, but I rather fancy it's Shakespeare-or, if not, it's some equally brainy lad-who says that it's always just when a chappie is feeling particularly top-hole, and more than usually braced with things in general that Fate sneaks up behind him with a bit of lead piping. There's no doubt the man's right. It's absolutely that way with me. Take, for instance, the fairly rummy matter of Lady Malvern and her son Wilmot. A moment before they turned up, I was just thinking how thoroughly all right everything was.