Zeitgeist: The Movie2007

Sourced:
Bill Hicks: Life's like a ride in an amusement park, and when you go on it you think it's real because that's how powerful our minds are. The ride goes up and down and round and round, it has thrills and chills and it's very brightly colored and it's very loud and it's fun... for a while. Some have been on the ride for a long time and they begin to question: "Is this real or is this just a ride?" And other people have remembered and they come back to us and they say: "hey, don't worry this is just a ride." And we kill those people.