The line comes from MGM's 1939 film The Wizard of Oz, adapted from L. Frank Baum's 1900 novel, where Ray Bolger plays the Scarecrow who travels to ask the Wizard for a brain. On the Yellow Brick Road he proves thoughtful and resourceful despite insisting he has no brain, which makes his comment about talkative, brainless people especially memorable. The exchange has been quoted for decades in discussions about empty talk, and short clips of the opening words now circulate online as a dry, old-Hollywood reaction to rambling speeches and pointless arguments everywhere.