The article draws attention to the Catholic Church's teaching on marriage and family which sees them intimately connected with God, including in their most corporeal reality. It far exceeds the moralistic dimension, which remains at the service of truth and protects against the trivialization of matters of the flesh. Fundamental to the Church's faith in this regard is the sacramentality of marriage. This profound and reciprocal union of God with the spouses and the spouses with God is what St. Paul calls the "Great Mystery." For sacramental marriage is called and receives effective grace so that the whole dynamic of married life is a living image of the communion of Persons in the Most Holy Trinity, an icon of the Incarnation and of the spousal love of Christ and the Community of the Church. In this context, the body shows itself as a sacred value and beauty as a spiritual experience. Love bestowing itself and reaching into eternity, on the other hand, turns out to be the shape of marital holiness.