The presentation of the death of Christ as the substitute exhibits the love of the cross more richly, fully, gloriously, and glowingly than any other account of it. Luther saw this and gloried in it. He once wrote to a friend:
"Learn to know Christ and him crucified. Learn to sing to him, and say, 'Lord Jesus, you are my righteousness, I am your sin. You have taken upon yourself what is mine and given me what is yours. You became what you were not, so that I might become what I was not.'" What a great and wonderful exchange! Was there ever such love?