In the parable of the lost sheep, Jesus explains that God (the shepherd) would leave 99 of his followers (the sheep) to find and rescue one that is lost, demonstrating God's great love and desire to save all people. The parable emphasizes that even though some may appear "righteous," God prioritizes seeking out and rejoicing over the return of those who have strayed, showcasing God's compassion and relentless pursuit of His children.