O’Toole concludes that the most probable originator was the little-known Switzer, an author who, in a 1907 work called “Mrs. Goose, Her Book” wrote, “It is better to remain silent at the ...

Lisa: It is better to remain silent and be thought a fool than open your mouth and remove all doubt. Homer’s Brain: What does that mean? Better say something or they’ll think you’re stupid.

On the origin of the quote "Better to remain silent and be thought a fool than to speak and to remove all doubt," which has been wrongly attributed to both to Abraham Lincoln and Mark Twain.