31 Years Later, George Costanza’s Greatest Seinfeld Line Is Still 1 of the Funniest Quotes in Sitcom History

George Costanza is arguably the funniest character on Seinfeld. His witty lines consistently deliver more laughs than Kramer’s wild appearances, Jerry’s stand-up-style comments, or Elaine’s chaotic experiences. A perfect example is his line from Season 6, Episode 16, “The Beard”—“It’s not a lie if you believe it”—which perfectly captures George’s personality and highlights his deep-seated insecurities.





