On the Holy Spirit — Source paragraphs and footnotes

Date uncertain | Ambrose of Milan

57. First, we understand that he called the Holy Spirit the Spirit of the Lord. Then, since he mentioned first the Holy Spirit and added: “Thou hast not lied unto men but unto God,” you must necessarily either understand the oneness of the Godhead in the Holy Spirit, since when the Holy Spirit is tempted a lie is told to God; or, if you endeavour to exclude the oneness of the Godhead, you yourself according to the words of Scripture certainly believe Him to be God.

Complete source paragraph · On the Holy Spirit, Chapter IX., source paragraph 7 · Original source

Date uncertain | Ambrose of Milan

58. For if we understand that these expressions are used both of the Spirit and of the Father, we certainly observe the unity of truth and knowledge in God the Father and the Holy Spirit, for falsehood is discovered alike by the Holy Spirit and by God the Father. But if we have received each truth concerning the Spirit, why do you, faithless man, attempt to deny what you read? Confess, then, either the oneness of the Godhead of the Father, of the Son, and of the Holy Spirit, or the Godhead of the Holy Spirit. Whichever you say, you will have said each in God, for both the Unity upholds the Godhead and the Godhead the Unity

Complete source paragraph · On the Holy Spirit, Chapter IX., source paragraph 8 · Original source