Church, therefore, instructed by the words of Christ, and drawing on the experience of Pentecost and her own apostolic history, has proclaimed since the earliest centuries her faith in the Holy Spirit, as the giver of life, the one in whom the inscrutable Triune God communicates himself to human beings, constituting in them the source of eternal life. 2. This faith, uninterruptedly professed by the Church, needs to be constantly reawakened and deepened in the consciousness of the People of God. In