59 What We have said concerning the "mystical Head" would indeed be incomplete if We were not at least briefly to touch on this saying of the same Apostle: "Christ is the Head of the Church: He is the savior of his Body." For in these words we have the final reason why the Body of the Church is given the name of Christ, namely, that Christ is the Divine Savior of this Body. The Samaritans were right in proclaiming Him "Savior of the world;" for indeed He most certainly is to be called the "Savior of all men," even though we must add with Paul: "especially of the faithful," since, before all others, He has purchased with His Blood His members who constitute the Church. But as We have already treated this subject fully and clearly when speaking of the birth of the Church on the Cross, of Christ as the source of life and the principle of sanctity, and of Christ as the support of His Mystical Body, there is no reason why We should explain it further; but rather let us all, while giving perpetual thanks to God, meditate on it with a humble and attentive mind. For that which our Lord began when hanging on the Cross, he continues unceasingly amid the joys of heaven: "Our Head," says St. Augustine, "intercedes for us: some members He is receiving, others He is chastising, others cleansing, others consoling, others creating, others calling, others recalling, others correcting, others renewing."But it is for us to cooperate with Christ in this work of salvation, "from one and through one saved and saviors."
Source: Mystici Corporis Christi (Vatican.va)