Catena Aurea on John 16:12–15: Augustine of Hippo

This is like what He said of Himself above, i. e. I can of Mine own Self do nothing; as I hear I judge. But that may be understood of Him as man; how must we understand this of the Holy Ghost, Who never became a creature by assuming a creature? As meaning that He is not from Himself. The Son is born of the Father, and the Holy Ghost proceeds from the Father. In what the difference consists between proceeding and being born, it would require a long time to discuss, and would be rash to define. But to hear is with Him to know, to know to be. As then He is not from Himself, but from Him from Whom He proceeds, from Whom His being is, from the same is His knowledge. From the same therefore His hearing. The Holy Ghost then always hears, because He always knows; and He hath heard, hears, and will hear from Him from Whom He is.