What does the Bible say about mercy and transgressions?

In Psalm 51, David appeals to God's mercy because of his own transgressions, recognizing the need for divine forgiveness. Verse 1 states, 'Have mercy upon me, O God, according to thy lovingkindness; according unto the multitude of thy tender mercies blot out my transgressions.' This illustrates the relationship between transgressions and mercy—our offenses against God require His mercy for restoration. David understands that sin is inherent to humanity, stating in verse 5, 'Behold, I was shapen in iniquity.' Thus, the existence of transgressions is a poignant reminder of our need for God's mercy.