2 Corinthians 5:18–20 All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation;  that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation.  Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God.

Reconciled is mentioned in all three of these verses. Reconciliation is definitely the primary point that God is trying to communicate.  Reconcile means to come together. For example, when a couple have a falling out and then they work out their differences, we would say they are reconciled going from enmity to friendship. Being reconciled involves more than just coming together. With true reconciliation there would be peace and harmony. Therefore, we need to look at these verses as coming together in peace and harmony. Also, to grasp the full picture of these verses and reconciliation, we need to look at the previous verse 17.

2 Corinthians 5:17 Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come.