The Book of Mormon opened on Broadway in 2011, created by Trey Parker, Matt Stone and Robert Lopez, and I Believe quickly became one of its signature numbers. Sung by the earnest missionary Elder Price, the song lists his convictions with increasing intensity, moving from scripture to personal beliefs that grow more implausible. The Tony Awards performance helped introduce it beyond theatre audiences, and the clip later circulated online as shorthand for misplaced certainty. It endures because that sincere delivery works just as well as satire as it does in the show itself.