How do we know God's grace is powerful enough to overcome sin?

The sermon articulates that the only power capable of overcoming sin is the grace of God, manifested through Jesus Christ's sacrifice on the cross. Christ bore our sins and fulfilled all requirements of the law, providing a way for reconciliation with God. This grace empowers believers to overcome the innate power of sin, which is separation from God. It reassures us that faith, granted by God's grace, allows us to trust in His salvation, breaking the chains of sin's hold on our lives.