We unseat judges with indignation who acquit the guilty. Our moral sensibility is outraged when wrong and guilt are given legal sanction. Yet at the heart of our gospel stands the sentence: God justifies the ungodly who trust in him. God acquits the guilty. That is the gospel! But how can it be right for God to do that?
The death of Christ does not turn away the wrath of God from all people. In order to benefit from the work that God has done outside of us, we must now experience the work that he does within us by the Holy Spirit. What is this work and how is it related to the gift of justification?
If we are unmerciful, unforgiving people, if we hold grudges or cherish resentments or plan revenge, then what we are saying in effect to God is, "This is the way I prefer life to be." And so he will give us what we have preferred at the day of judgment; no mercy, no forgiveness, but only vengeance. If Christ has not changed us (and I don't mean perfection, but only significant change), then probably we have never known him.
Lord's Supper is a memorial service looking back to Jesus' utterly unique death—a death that so satisfied the righteous demands of God that Jesus was granted to rise from the dead and come again as King of all. The sacrifice of Christ set the charge for the explosion of his second coming.