From now on, therefore, we regard no one according to the flesh. Even though we once regarded Christ according to the flesh, we regard him thus no longer. Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come … For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.
2 Corinthians 5:16-17; 21
Every relationship within creation was fractured when sin entered into the world. Not only was mankind separated from God, but we were put at odds with one another. Jesus came to bring restoration to our broken relationships - first to God, and then to each other.
Because of the amazing work of Jesus Christ, in forgiving our sins when we did not deserve mercy, we can (and must) also seek to be reconciled with others. Scripture tells us that we have the ministry of reconciliation - it's our full-time occupation.
All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation ...
2 Corinthians 5:18