How do we know that God's grace is essential for repentance?

In Job 33:28, the verse states that God will deliver a soul from going into the pit if they confess their sin. This indicates that repentance is not merely an action initiated by man but a work of God's grace in the heart of the believer. The Gospel teaches us that it is God who grants repentance (Acts 5:31) as a gift. This aligns with the understanding that true sorrow for sin and the ability to turn from it comes from recognizing the cost of that sin in light of Christ's sacrifice. Thus, any genuine repentance is underscored by God’s grace, showing that it is all about His mercy and His work, not our efforts.