"The Spirit of the Lord hath filled the whole world, alleluia; and that which containeth all things hath knowledge of the voice, alleluia, alleluia, alleluia." (Psalm 67:)
- Introiot: Mass of Pentecost
The Gifts of the Holy Ghost perfect the supernatural virtues by enabling us to practice them with greater docility to Divine inspiration. As we grow in the knowledge and love of God under the direction of the Holy Ghost, our service becomes more sincere and generous, the practice of virtue more perfect. Such acts of virtue leave the heart filled with true joy and consolation and are know as the fruits of the Holy Ghost. These fruits in turn render the practice of virtue more attractive and become a powerful incentive for still greater efforts in the service of God, to serve Whom is to reign.
"... previously to the manifestation of Himself, the Holy Ghost was to effect that of the Divine Word. When Infinite Power called into existence the body and soul of the future Mother of God, it was He that prepared the Dwelling for the Sovereign Majesty, by sanctifying Mary from the instant of her Conception, and taking possession of her as the temple into which the Son of God was soon to enter. When the ever blessed day of the Annunciation came, the Archangel declared unto Mary that the Holy Ghost would come upon her, and that the Power of the Most High would overshadow her. No sooner did the Virgin consent to the fulfillment of the eternal decree, than the operation of the Divine Spirit produced within her the most ineffable of mysteries: The Word was made Flesh, and dwelt among us!"
- Dom Gueranger on our Lady and the Holy Spirit