Why is true repentance important for Christians?

True repentance is foundational for Christians because it signifies a heartfelt turning away from sin and a return to God. In 2 Corinthians 7:10, Paul explains that godly sorrow produces repentance that leads to salvation without regret. This concept of repentance is exemplified through David's realization of his sin in 2 Samuel 12 and his plea in Psalm 51, where he cries out for mercy and cleansing. True repentance not only acknowledges sin but also recognizes the believer's dependence on God's grace to effect change. It is a transformative experience that restores the relationship between the sinner and God, showcasing God's mercy and love, ultimately leading to spiritual growth and a closer walk with Christ.