The Father is holy, and likewise the Son and the Spirit, and so They are honoured in the same Trisagion: nor can we speak more worthily of God than by calling Him Holy; whence it is clear that we must not derogate from the dignity of the Holy Spirit. In Him is all which pertains to God, since in baptism He is named with the Father and the Son, and the Father has given to Him to be greater than all, nor can any one deprive Him of this. And so from the very passage of St. John which heretics used against His dignity, the equality of the Trinity and the Unity of the Godhead is established. Lastly, after explaining how the Son receives from the Father, St. Ambrose shows how various heresies are refuted by the passage cited.