"If you invent two or three people and turn them loose in your manuscript, something is bound to happen to them -- you can't help it; and then it will take you the rest of the book to get them out of the natural consequences of that occurrence, and so first thing you know, there's your book all finished up and never cost you an idea."
And if you don't like that one, or if you're not a writer, here's a thought from Mark Evanier's Jerry Lewis Telethon wrapup:
Something interesting has happened to this telethon in the last decade
or so and it's because of Jerry. Back in the seventies, he took a lot of heat for its excesses, its pandering, its promotion of his friends and their careers. But back then, he was just a comedian whose TV shows got cancelled and whose movie career had atrophied. The cause seemed to be promoting Jerry Lewis instead of the other way around.
That was then, this is now. As we've bemoaned on this site before, we're running out of legendary comics. We're going to wake up one morning soon and the Elder Statesman of Comedy will be a Wayans brother.