How do we know Christ's work on the cross is sufficient?

The sufficiency of Christ's work is grounded in the truth that He has created peace through His sacrifice, breaking down the barrier of sin that separates us from God. Ephesians 2:14 states that Jesus is our peace, which indicates that through His death and resurrection, He has addressed the fundamental need for reconciliation between God and humanity. This reconciliation is not based on our works or rituals but solely upon the completed work of Christ. The efficacy of His sacrifice is demonstrated as He fulfills the law and offers a new covenant, which guarantees that all who believe are brought into communion with God without the barriers that once existed.