89. Let us then go back to the same words: “It is God Who shined in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.” You have Christ plainly set forth. For Whose glory is said to give light but that of the Spirit? So, then, he set forth God Himself, since he spoke of the glory of God; if of the Father, it remains that “He who said that light should shine out of darkness, and shine in our hearts,” be understood to be the Holy Spirit, for we cannot venerate any other with the Father and the Son. If, then, you understand the Spirit, Him also has the Apostle called God; it is necessary, then, that you also confess the Godhead of the Spirit, who now deny it.