Christianity is a union of two loves in the one person of Jesus Christ.
The Holy Spirit is the love of God come down to earth. Mary is human love rising to meet God.
Jesus Christ is the heart of this union: the intersection of a two-fold love.
We must try to understand the meaning of this union between the Holy Spirit and His instrument, the Blessed Virgin. We must try to plumb the depths contained in this truth: that Christ is the fruit of this mutual love.
At the heart of the Credo are the words: “And Jesus was incarnate by the Holy Spirit of the Virgin Mary.”
~ Cardinal Suenens