Two priests attend the same church every Sunday. One drives and one rides a bike. One Sunday, the bike rider shows up without his bike.

The first priest asks, "Where is your bike?" The second answers, "I don't know if it was stolen or simply lost."

The first priest says, "Just recite the 10 Commandments when you are alone. When you get to Thou Shall Not Steal, you will get your bike back."

The next week, the second priest shows up with his bike. The first priest says, "See I told you it would work." The second priest says, "It sure did. When I got to Thou Shall not Commit Adultery, I remembered where I left it."