A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 27 Page 16

of playing myself for a prophet was the worst. Still, it had its ameliorations.

A prophet doesn’t have to have any brains. They are good to have, of course, for the ordinary e11gencies of life, but they are no use in professional work. It is the restfulest vocation there is. When the spirit of prophecy comes upon you, you merely take your intellect and lay it off in a cool place for a rest, and unship your jaw and leave it alone; it will work itself: the result is prophecy.

Every day a knight-errant or so came along, and the sight of them fired the king’s martial spirit every time. He would have forgotten himself, sure, and said something to them in a style a suspicious shade or so above his ostensible degree, and so I always got him well out of the road in time.