Why does God rejoice over a sinner who repents?

The response to a sinner’s repentance is met with rejoicing in heaven, as illustrated in Luke 15. In each parable, we see celebration when the lost is found — the shepherd rejoices over the recovered sheep, the woman celebrates the recovered coin, and the father throws a feast for his returning son. This rejoicing signifies the profound love and mercy present in God's heart toward sinners. The act of repentance represents a turning back to the Father, which is a significant milestone in the believer's journey. It shows that God's grace not only forgives but also restores, filling heaven and earth with joy as souls come back into communion with Him.