A person is smart. People are dumb, panicky dangerous animals and you know it. Everything they’ve ever “known” has been proven to be wrong. A thousand years ago everybody knew as a fact, that the earth was the center of the universe. Five hundred years ago, everybody knew that the Earth was flat, and fifteen minutes ago, you knew that humans were alone on it. Imagine what you’ll know tomorrow.
— Agent K (Tommy Lee Jones), Men in Black.