Truthiness Made Simple

From Nathan Rabin's interview with Stephen Colbert for The Onion's A.V. Club, published Jan. 25, 2006:

"Truthiness is 'What I say is right, and [nothing] anyone else says could possibly be true.' It's not only that I feel it to be true, but that I feel it to be true. There's not only an emotional quality, but there's a selfish quality."