For God commands us to be peacemakers, and in agreement, and of one mind in His house; and such as He makes us by a second birth, such He wishes us when newborn to continue, that we who have begun to be sons of God may abide in God’s peace, and that, having one spirit, we should also have one heart and one mind. Thus God does not receive the sacrifice of a person who is in disagreement, but commands him to go back from the altar and first be reconciled to his brother, that so God also may be appeased by the prayers of a peacemaker. Our peace and brotherly agreement is the greater sacrifice to God, and a people united in one in the unity of the Father, and of the Son, and of the Holy Spirit.
Cyprian of Carthage. (1886). On the Lord’s Prayer. In A. Roberts, J. Donaldson, & A. C. Coxe (Eds.), R. E. Wallis (Trans.), Fathers of the Third Century: Hippolytus, Cyprian, Novatian, Appendix (Vol. 5, p. 454). Buffalo, NY: Christian Literature Company.