2 Cor 5:17-21 "Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come! All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation: that God was reconciling the world to himself in Christ, not county men's sins against them. And he has committed to us the message of reconciliation. We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God. Gad made him who had no sin to be sin for us, so that in him we might become the righteousness of God."
Matthew 18: 15-19 "If your brother sins against you, go and show him his fault, just between the two of you. If he listens to you, you have won your brother over. But if he will not listen, take one or two others along, so that every matter may be established by the testimony of two or three witnesses. If he refuses to listen to them, tell it to the church and if he refuses to listen even to the church, treat him as you would a pagan or a tax collector. I tell you the truth, whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed on heaven. Again, I tell you that if two of you on earth agree about anything you ask for it will be done for you by my Father in heaven. For where two or three come together in my name, there am I with them."