"Some men love to work, so they work; others love the things money will buy, so they work to get money. There are men who love to loaf, and loaf. Slaves did not love to be beaten, so they worked in order that they wouldn't get beatings."
— Kenneth Robeson (Lester Dent), Fortress of Solitude
(The next line, of course, is: "Doc Savage's five assistants loved excitement and adventure, and that bound them to the bronze man.")