Final answer:
The parables in Luke chapter 15 illustrate the joy that occurs in heaven when a sinner repents, emphasizing compassion, forgiveness, and the celebration of redemption.
Step-by-step explanation:
The parables in Luke chapter 15 serve to teach about the joy in heaven over one sinner that repents. In this chapter, we find the Parable of the Lost Sheep, the Lost Coin, and the Prodigal Son, which all emphasize the value of repentance and redemption. Each parable ends with a celebration, representing the rejoicing in heaven when a sinner repents. These parables challenge the attitudes of the Pharisees and others who looked down upon publicans and sinners with whom Jesus associated, demonstrating God's inclusive love and the importance of compassion and forgiveness.