How do we know that Jesus is able to fulfill the law and conquer sin?

In Matthew 20:22-23, Jesus illustrates that it is not within human ability to bear the cup of suffering required for atonement. However, He is uniquely able to drink this cup and fulfill the law's demands on our behalf. He silenced the law and conquered sin by His sacrifice on the cross, where our sins were imputed to Him. This act of substitution fulfills God's justice, allowing believers to be seen as righteous in God's eyes. Hence, all who trust in Him can have confidence in His ability to uphold the law and provide perfect salvation.