Tractates on the Gospel of John

³ But when John the Baptist said, “For God gives not the Spirit by measure,” he was speaking exclusively of the Son of God, who received not the Spirit by measure; for in Him dwells all the fullness of the Godhead. And no more is it independently of the grace of the Holy Spirit that the Mediator between God and men is the man Christ Jesus: for with His own lips He tells us that the prophetical utterance had been fulfilled in Himself: “The Spirit of the Lord is upon me; because He has anointed me, and has sent me to preach the gospel to the poor.” For His being the Only-begotten, the equal of the Father, is not of grace, but of nature; but the assumption of human nature into the personal unity of the Only-begotten is not of nature, but of grace, as the Gospel acknowledges itself when it says, “And the child grew, and waxed strong, being filled with wisdom, and the grace of God was in Him.” But to others He is given by measure—a measure ever enlarging until each has received his full complement up to the limits of his own perfection.

As we are also reminded by the apostle, “Not to think of ourselves more highly than we ought to think, but to think soberly; according as God has dealt to every man the measure of faith.” Nor is it the Spirit Himself that is divided, but the gifts bestowed by the Spirit: for there are diversities of gifts, but the same Spirit.