"What does the cross show us? What do we see when our eyes are opened? We see that our sins are laid on Jesus, and that His righteousness is placed on us. Jesus had legions of angels available, which could have been an overwhelming defense. Nobody could have done Him any harm without His allowing it, but He did not use His defense. Through His obedience, He made His defense available to us."
And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross. Philippians 2:8
"The blood of Jesus Christ has great power! There is perhaps not a phrase in the Bible that is so full of secret truths as "the blood of Jesus." It is the secret of His Incarnation, when Jesus took our flesh and blood; the secret of His obedience unto death, when He gave His life at the Cross of Calvary; the secret of His love that went beyond all understanding when He bought us with His blood; the secret of the enemy and the secret of our eternal salvation."