Two home teachers went out one Saturday to visit their families. At one home, it was obvious that someone was there, but nobody came to the door even though they knocked several times. Finally, the senior companion took out a piece of paper and wrote the member's name on the card with the words, "Revelations 3:20" written below it, and stuck the paper in the crack in the door.
(Revelations 3:20 -- Behold, I stand at the door and knock. If anyone hears my voice and opens the door, I will come in to him and dine with him, and he with me).
The next day, on Sunday, the piece of paper was returned to the home teacher. Below the home teacher's message was the notation "Genesis 3:10"
(Genesis 3:10 -- I heard your voice in the garden, and I was afraid because I was naked; and I hid myself).