The answer
We have said previously that the Church is the Body of Christ, that is to say that She is where Christ is present and is transfigured. The Holy Spirit is the One Who fulfills the statement, “The Church, the Body of Christ,” through His work in the Divine Mysteries.
As God spoke to man in the Garden saying, “Increase and multiply, and fill the earth” (Gen. 1:28 LXX), thus establishing marriage and making it possible, it was the union of man and woman which fulfilled the word of God. Likewise, it is the Holy Spirit Who fulfills the presence of Christ in us, because Baptism is the door through which the members of Christ are born and are united by the Holy Spirit. So, we mention it in the Creed, because it is the first step of the Christian life.
His Holiness Pope Tawadros II
Pope Tawadros II, My Faith: A Series of Dialogues on the Creed (Coptic Orthodox Patriarchate, 2014), 143.
The page in the book (143)
