After proof that the Spirit is the Giver of revelation equally with the Father and the Son, it is explained how the same Spirit does not speak of Himself; and it is shown that no bodily organs are to be thought of in Him, and that no inferiority is to be supposed from the fact of our reading that He hears, since the same would have to be attributed to the Son, and indeed even to the Father, since He hears the Son. The Spirit then hears and glorifies the Son in the sense that He revealed Him to the prophets and apostles, by which the Unity of operation of the Three Persons is inferred; and, since the Spirit does the same works as the Father, the substance of each is also declared to be the same.