Answer:
In a religious standpoint, the parable of the lost sheep, which comes from the Holy Bible, essentially states that Jesus (the shepherd in the story), would go out of his way to find the sinners (the lost sheep), and bring them back to God. It can also be taken in the context that the lost sheep are those who do not believe, and that the shepherd would go and 'save' them, or convert them to Christianity. Essentially, it is God's promise to go out to save those who stray from the path.
