One Sunday, the young pastor decided to use the 23rd Psalm for his children's sermon. He began to tell the children about sheep—that they aren't smart and need lots of guidance and that a shepherd's job is to stay close to the sheep, protect them from wild animals and keep them from wandering away.
He pointed to the little children in the room and said they were the sheep and needed lots of guidance. Then the pastor put his hands out to the side, palms up in a dramatic gesture, and with raised eyebrows said to the children, "If you are the sheep, then who is the shepherd?" He was pretty obviously indicating himself.
A few seconds of silence followed, then one little boy said, "Jesus is the shepherd."
The young pastor, obviously caught by surprise, said to the boy, "Well, then, who am I?"
The boy thought for a moment and then said with a shrug, "I guess you must be a sheep dog."