And call no man your father upon the earth: for one is your Father, who is in heaven.
All Commentaries on Matthew 23:9 Go To Matthew 23
Jerome
AD 420
No one should be called teacher or father except God the Father and our Lord Jesus Christ. He alone is the Father, because all things are from him. He alone is the teacher, because through him are made all things and through him all things are reconciled to God. But one might ask, “Is it against this precept when the apostle calls himself the teacher of the Gentiles? Or when, as in colloquial speech widely found in the monasteries of Egypt and Palestine, they call each other Father?” Remember this distinction. It is one thing to be a father or a teacher by nature, another to be so by generosity. For when we call a man father and reserve the honor of his age, we may thereby be failing to honor the Author of our own lives. One is rightly called a teacher only from his association with the true Teacher. I repeat: The fact that we have one God and one Son of God through nature does not prevent others from being understood as sons of God by adoption. Similarly this does not make the terms father and teacher useless or prevent others from being called father. .