How do we know that Jesus' sacrifice atones for our sins?

The atoning sacrifice of Jesus is central to the Christian faith, emphasizing that He alone is able to pay the penalty for sin. As the preacher articulates, there was no other good enough to pay the price of sin (Hebrews 10:14), and it is through His flesh given for the life of the world that we achieve reconciliation with God (John 6:51). Furthermore, Romans 5:8 affirms that God demonstrates His love for us by Christ dying for us while we were yet sinners, highlighting the sufficiency and necessity of His sacrifice. This understanding is vital within sovereign grace theology, which asserts that salvation is wholly dependent on God's initiative in Christ.