“Therefore if you are presenting your offering at the altar, and there remember that your brother has something against you, leave your offering there before the altar and go; first be reconciled to your brother, and then come and present your offering. Make friends quickly with your opponent at law while you are with him on the way, so that your opponent may not hand you over to the judge, and the judge to the officer, and you be thrown into prison. Truly I say to you, you will not come out of there until you have paid up the last cent.”
Matthew 5:23-26
Reconciliation with all others must take place prior to worshiping God or seeking his forgiveness. This includes adversaries and anyone you know to be holding something against you.
God desires that we approach him without hypocrisy. The relationships we have are mirrors of our heart actions towards others. God is always looking for our hearts to be pure and consistent in all ways with everyone; this includes those who would maintain an adversarial position towards us.
God values reconciliation over proving our personal “rightness” in any situation. Forgiveness requires humility.
The Core of the Bible 