There once was a map who was walking in the fields with his 100 sheep.
Before he knew it, one of the sheep had gone missing. The man was very worried, for he didn't want to leave one of his sheep lost.
He decided to go looking for the lost sheep, and make sure he would find it, so it could return to him.
The man then found the lost sheep, and was very happy to find him, for he wouldn't leave a sheep behind.
He then walked the sheep back to the others, guiding him throughout the journey.
The sheep were then reunited and the man would continue to make sure that if any sheep was lost or misguided, he would always come and find them. This relates to Christianity, because if any person was lost in life or sinned against God, God would also come back for them and guide them. In this story, the sheep represent the people, the man represents Good and the lost sheep represents the lost person.