In the 1995 movie, The American President, there is a scene where President Andrew Shepherd, played by Michael Douglas, is in a heated discussion with his domestic policy advisor, Lewis Rothschild, played by Michael J. Fox, about the President's falling poll numbers.
In this scene Rothschild pleads: "People want leadership, Mr. President, and in the absence of genuine leadership, they'll listen to anyone who steps up to the microphone. They want leadership. They're so thirsty for it they'll crawl through the desert toward a mirage, and when they discover there's no water, they'll drink the sand."
To which President Shepherd responds: "People don't drink the sand because they're thirsty, Lewis. They drink the sand because they don't know the difference."