Impossibility of forgiving sins (We cannot forgive each other)

This post is not tied to any particular passage, but something that comes up again and again.

Summary:  As Christians, we often believe that it is our duty to forgive the sins of others.  This is not actually what the New Testament teaches.  The New Testament teaches that God forgives sins, not us; That said, we enable life together to happen by extending forgiveness to others.

Point #1:  Forgiveness of sins is a key mission of Jesus Christ

(The word for forgiveness here is αφεσις; the word for sin is αμαρτια)

• Jesus instructs his disciples before his ascension:  Repentance for the forgiveness of sins should be proclaimed in his name to all nations, beginning from Jerusalem. (Luke 24:47)
• Jesus describes the new covenant:  "for this is my blood of the covenant, which is poured out for many for the forgiveness of sins. (Matthew 26:28)
• In Pauline epistles:  "We have redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace." (Ephesians 1:7).  I realize that many argue Luther(ans) overemphasize forgiveness in Paul, but it would be impossible to read Paul, even the perceived "real" Paul, and say that forgiveness was neither significant nor connected with justification.
• Hebrews has a lengthy developments of the theme of forgiveness and Jesus work as the new sacrifice, once and for all.  (E.g.:  Indeed, under the law almost everything is purified with blood, and without the shedding of blood there is no forgiveness of sins.)

Point #2:  Forgiveness of sins is a divine and not human task

• In Matthew 9, Mark 2 and Luke 5, there is the story of a paralytic who is healed.  In each case, the issue is whether Jesus had permission to forgive sins.  In fact, his forgiving sins is considered blasphemy because it means he is assuming the role of God.
• In Matthew's Gospel, Jesus teaches about prayer and forgiveness.  However, The Lord's Prayer does not invite us to forgive the sins of others
• The Lord's Prayer in Matthew's Gospel:  καὶ ἄφες ἡμῖν τὰ ὀφειλήματα ἡμῶν, ὡς καὶ ἡμεῖς ἀφήκαμεν τοῖς ὀφειλέταις ἡμῶν.  Forgive us our debts as we forgave the debts of others. (6:12)
• Further instructions about forgiveness:  Ἐὰν γὰρ ἀφῆτε τοῖς ἀνθρώποις τὰ παραπτώματα αὐτῶν, ἀφήσει καὶ ὑμῖν ὁ πατὴρ ὑμῶν ὁ οὐράνιος·(6:14)  Here we are invited to forgive the trespasses.  While this is similar to sins, the writer Matthew is clearly avoiding commanding us to forgive the sins of others.  Why?  Because this is for God alone!
• In Luke's Gospel, there is also careful attention paid to the words around forgiveness:  
• καὶ ἄφες ἡμῖν τὰς ἁμαρτίας ἡμῶν, καὶ γὰρ αὐτοὶ ἀφίομεν παντὶ ὀφείλοντι ἡμῖν.  Forgive us our sins as we are forgiving others.  (11:4).  
• In Luke's Gospel, the lack of human capacity to forgive sins is even more strongly underscored by the change in words here.  We are to pray that our sins are forgiven, but we are to forgive debts.
• The only time humans are commanded to forgive sins is when they are given the "power of the keys", that is, explicitly told to forgive sins.  This is done by the resurrected Christ as he breathes on his disciples the Holy Spirit
• “Receive the Holy Spirit. If you forgive the sins of any, they are forgiven them; if you withhold forgiveness from any, it is withheld.” (John 20:22-23)
• When we look at the New Testament (and Old Testament) as a whole, we realize that within the biblical worldview, the declaration that humans can forgive sins is earth shattering.  Literally.  This is not a casual declaration that we can live and let live, but that human agents can change the divine ledger.  This is a truly awesome power given over to the apostles.  

Point #3:  As Christians, we are to practice forgiveness toward each other, but outside of the office of the keys, this is not about declaring someone forgiven before God.  Rather, this is about making life possible together.

• In Ephesians and Colossians, we are commended to forgive each other.  Yet a look at the words, reveals this is not about forgiving sins:
• ἀνεχόμενοι ἀλλήλων καὶ χαριζόμενοι ἑαυτοῖς ἐάν τις πρός τινα ἔχῃ μομφήν· καθὼς καὶ ὁ κύριος ἐχαρίσατο ὑμῖν οὕτως καὶ ὑμεῖς·  "...bearing with one another and, if one has a complaint against another, forgiving each other; as the Lord has forgiven you, so you also must forgive." (Colossians 3:13, cf Ephesians 4:32)
• The word that is used here is χαριζόμαι, which means "be gracious to", "give favor" akin to Mary being called "full of grace."  The point here is not to declare them righteous before the heavenly Father, but to be gracious to them.
• In Luke's Gospel, we are commanded to forgive someone seven times seventy times. 
• ἐὰν ἁμάρτῃ ὁ ἀδελφός σου ἐπιτίμησον αὐτῷ, καὶ ἐὰν μετανοήσῃ ἄφες αὐτῷ· 4 καὶ ἐὰν ἑπτάκις τῆς ἡμέρας ἁμαρτήσῃ εἰς σὲ καὶ ἑπτάκις ἐπιστρέψῃ πρὸς σὲ λέγων Μετανοῶ, ἀφήσεις αὐτῷ. If your brother sins, rebuke him.  If he repents, forgive him.  And if he sins against you seven times that day, saying "I repent" forgive him. (Luke 17:3-4)
• Here may be the only time in Scripture that we are commanded to forgive someone else for what they do.  However, linguistically, the object of the forgiveness is the person, not their sins (we forgive them, not their sins).  This forgiveness here seems far more like akin to the meaning "let go" or "permit" (also meanings of the word αφεσις).  In short, what seems at stake here is letting the person back into your life, rather than declaring them forgiven before God.

Admission:  I am not developing here a deep theology of "the office of the keys" by which humans declare to each other that they are forgiven on Christ's behalf.  This is certainly a reality.  Humans need an external word of forgiveness and we can become Christ to each other, to offer forgiveness.  I am thinking more of a situation in which two people are upset with each other and the one person begins to feel they are responsible for "generating" the love required to forgive the other person.

What is at stake:  When Christians teach an ethic of forgiveness, we need to be careful that we do not ascribe too lofty a goal for ourselves.  God takes care of the heavenly ledger.  Outside of the office of the keys, this is not ours to mess with.  What is our job is to trust that Christ has been gracious to us and therefore find a way to be gracious to others.  More deeply, we might begin to see that God is also gracious to others and has forgiven them and therefore, any movement to forgive them is an act of aligning ourselves with God's movement.

Furthermore, God's forgiveness creates resurrection and new life -- this is in fact, what the story of the healed paralytic shows.  The man, forgiven, rises to new life.  As Luther writes, "where there is forgiveness of sins, there is also life and salvation."  We cannot transform the hearts of others.  This is the work of God.  What we can do - with Christ's love - is make life possible for each other...and on rare occasions, be given the great joy of handing over the promises that Jesus has already forgiven the other person.