How do we know God's mercy is genuine?

The genuineness of God's mercy is compellingly illustrated in Hebrews 8, where He promises not to remember our iniquities. This assurance is not merely a statement of goodwill; it is rooted in the work of Christ, who bears the punishment for sin on our behalf. Thus, while God remains just—never overlooking sin—He extends mercy through the sacrifice of Christ. This duality is essential to understanding the nature of God. He is both perfectly just and abundantly merciful, allowing Him to pardon sinners without compromising His holiness. Isaiah affirms this balance when he states that God is 'a just God and a Savior' (Isaiah 45:21). The promise of the new covenant reassures believers that their sins are eternally dealt with, establishing a secure relationship with God based on grace.