Yves Congar offers a historical analysis of the theology of the Holy Spirit from the revelation in the biblical writings until Vatican II, through the two millennia of Christianity. All this with a serious and well-founded this great theologian of Vatican II that explores the role of the Spirit in the Christian sacraments with special emphasis on the confirmation and Holy Communion.
Congar stops to explain the duality of tradition between East and West. It is, in part, the problem of the procession of the Holy Spirit from the Father and the Son and, secondly, the role of Spirit in the sacraments, especially in the Eucharist. Two different traditions, each with their reasons, but basically the same faith and spiritual experience smooth.