I love this classic bit from The Andy Griffith Show. It reminds me of people who want to argue with you about the Scriptures, but they don't know as much as they think they know...
(scroll down to the music player and pause it first)
Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.
(Hebrews 2:1 - KJV)