How do we know that Christ's reconciliation is sufficient?

The sufficiency of Christ's reconciliation lies in His sacrifice, as stated in Colossians 1:20, where He made peace through the blood of His cross. This act reconciles all things, including humanity, back to God. Those who were once alienated and enemies due to their wicked works have been reconciled through the death of Christ (Colossians 1:21-22). His ability to reconcile rests on His divine nature and the fulfillment of God's justice through His sacrificial death. Thus, all who believe are assured of peace with God.