Chapter 5 — Part I: The Creed — Article III: Who Was Conceived by the Holy Ghost, Born of the Virgin Mary
Section 12. As the body of Christ was formed of the pure blood of the immaculate Virgin without the aid of man, as we have already said, and by the sole operation of the Holy Ghost, so also, at the moment of His Conception, His soul was enriched with an overflowing fullness of the Spirit of God, and a superabundance of all graces. For God gave not to Him, as to others adorned with holiness and grace, His Spirit by measure, as St. John testifies but poured into His soul the plenitude of all graces so abundantly that of his fullness we all have received.