Origen's Commentary on the Gospel of Matthew

And perhaps that which Simon Peter answered and said, “Thou art the Christ, the Son of the living God,” if we say it as Peter, not by flesh and blood revealing it unto us, but by the light from the Father in heaven shining in our heart, we too become as Peter, being pronounced blessed as he was, because that the grounds on which he was pronounced blessed apply also to us, by reason of the fact that flesh and blood have not revealed to us with regard to Jesus that He is Christ, the Son of the living God, but the Father in heaven, from the very heavens, that our citizenship may be in heaven, revealing to us the revelation which carries up to heaven those who take away every veil from the heart, and receive “the spirit of the wisdom and revelation” of God. And if we too have said like Peter, “Thou art the Christ, the Son of the living God,” not as if flesh and blood had revealed it unto us, but by light from the Father in heaven having shone in our heart, we become a Peter, and to us there might be said by the Word, “Thou art Peter,” etc. For a rock is every disciple of Christ of whom those drank who drank of the spiritual rock which followed them, and upon every such rock is built every word of the church, and the polity in accordance with it; for in each of the perfect, who have the combination of words and deeds and thoughts which fill up the blessedness, is the church built by God.