At bottom, I mean profoundly at bottom, the FBI has nothing to do with Communism, it has nothing to do with catching criminals, it has nothing to do with the Mafia, the syndicate, it has nothing to do with trust-busting, it has nothing to do with interstate commerce, it has nothing to do with anything but serving as a church for the mediocre. A high church for the true mediocre.

The Sixth Presidential Paper — A Kennedy Miscellany : An Impolite Interview - The Presidential Papers (1963)