How do we know that Christ's atoning sacrifice is sufficient?

The sufficiency of Christ's atoning sacrifice is foundational to sovereign grace theology. It is grounded in the belief that Christ, as our substitute, perfectly fulfilled the law of God on our behalf and bore the penalty for our sins. Acts 20:28 highlights that God purchased the church with His own blood, indicating the infinite value of Christ's sacrifice. Furthermore, Romans 3:24-26 emphasizes that through faith in Jesus, believers are justified freely by God's grace. This means that His sacrifice is adequate to cover all the sins of the elect, ensuring their redemption and reconciliation with God once for all.