How do we know that Jesus' death was for our sins?

The foundation of our belief that Jesus died for our sins lies in Scripture’s many affirmations of His role as the sinner's substitute. In Galatians 3:13, it states that Jesus became a curse for us, fulfilling God's justice concerning sin. This act of self-sacrifice is not merely a historical event; it is the crux of the Gospel message, underscored by His agony and the Father's rebuke that broke His heart (Psalm 69:20). The theological implication here is profound: through His suffering and death, Christ not only demonstrated God’s love but also satisfied divine justice, allowing for our redemption.