147. The operation, then, of the Father, the Son, and the Holy Spirit is one, unless perchance you, who deny the oneness of the same operation upon the Apostle, think this; that the Father and the Spirit wrought in Peter, in whom the Son had wrought, as if the operation of the Son by no means sufficed for him to the attainment of the grace. And so the strength of the Father, of the Son, and of the Holy Spirit being as it were joined and brought together, the work was manifold, lest the operation of Christ alone should be too weak to establish Peter.