It remains therefore that we now consider how, when the Lord had been born of a virgin, and the Holy Spirit descended in a bodily form like a dove, and fiery tongues were seen with a sound made from heaven on the day of Pentecost after the Lord's ascension—it was not the very Word of God through the substance by which He is equal and co-eternal to the Father, nor the Spirit of the Father and the Son through the substance by which He too is co-equal and co-eternal to both, but assuredly a creature which could be formed and made to exist in those modes, that appeared to bodily and mortal senses; and what difference there is between those [Old Testament] manifestations and these proper manifestations of the Son of God and of the Holy Spirit, although they too were effected through a visible creature—a matter which we shall more conveniently begin from another volume.