How do we know Christ's sacrifice is effective for our sins?

The effectiveness of Christ's sacrifice is grounded in His perfect obedience and sacrificial death. As mentioned in Galatians 3:13, 'Christ redeemed us from the curse of the law by becoming a curse for us.' This indicates that through His death, Christ bore the punishment for sin that we deserved. Furthermore, He lived a sinless life, completely fulfilling the law, which establishes His righteousness as the basis for our salvation. In Romans 3:24-25, it emphasizes that we are justified freely through His grace, through the redemption that came by Christ Jesus. Therefore, His atoning work assures believers of salvation and reconciliation with God.