In a mighty wind and tongues of fire, God the Holy Spirit descended upon the early Church on Pentecost, fifty days after Easter and ten days after Jesus ascended into Heaven. The Holy Spirit transformed the Apostles from timid, fearful men to the courageous men of faith through whom Christ wanted to evangelize the world.

The Holy Spirit carries out Christ’s work in the Church when persons are willing to answer God’s invitation to love Him and one another. As Jesus Christ is the center of the History of Salvation, so the mystery of God is the center from which this history takes its origin and to which it is ordered to its last end. …

God the Holy Spirit is especially present in the Catholic Church. The Holy Spirit gives His divine life of grace to the Catholic Church, making it pleasing to God. He is present to help the Church to carry on the work of Christ in the world. He moves people by His grace to unite themselves in sincere love with God …

God the Father and God the Son behold the infinite lovableness of each other. There flows between these two divine Persons a Love which is divine and personal. It is a Love so perfect that it is a living Love. This Love is God, the Holy Spirit, the Third Person of the Blessed Trinity. The Father and the Son eternally …