taken from Desiring God website
Luther gazed at Christ’s cross with steady joy and gloried in the fact that whoever trusts Christ can be assured of his love. He once wrote to a troubled 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 have become what you were not so that I might become what I was not.’” There has been an exchange, a great and wonderful exchange (Luther actually used that phrase, a “wonderful exchange”), whereby the Son of God has taken all our guilt in order to set upon us all his righteousness.
The reason I can come to God as I am is because of what He did at the cross. The great exchange at the cross shows His amazing love. We who deserve punishment and death received righteousness and eternal life.
John 3:16-21
16 “For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life. 17 For God did not send his Son into the world to condemn the world, but in order that the world might be saved through him. 18 Whoever believes in him is not condemned, but whoever does not believe is condemned already, because he has not believed in the name of the only Son of God. 19 And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil. 20 For everyone who does wicked things hates the light and does not come to the light, lest his works should be exposed. 21 But whoever does what is true comes to the light, so that it may be clearly seen that his works have been carried out in God.”
Related Holy Week Posts:
2. What Happened at the Cross?
3. Come Follow Me to the Cross