Ven. Pius XII : "But we deem it necessary to recall that the priest acts for the people only because he represents Jesus Christ, who is Head of all His members and offers Himself in their stead. Hence, he goes to the altar as the minister of Christ, inferior to Christ but superior to the people.[83] The people, on the other hand, since they in no sense represent the divine Redeemer and are not mediator between themselves and God, can in no way possess the sacerdotal power."

80. It is, therefore, desirable, Venerable Brethren, that all the faithful should be aware that to participate in the eucharistic sacrifice is their chief duty and supreme dignity, and that not in an inert and negligent fashion, giving way to distractions and day-dreaming, but with such earnestness and concentration that they may be united as closely as possible with the High Priest, according to the Apostle, "Let this mind be in you which was also in Christ Jesus."[80] And together with Him and through Him let them make their oblation, and in union with Him let them offer up themselves.

81. It is quite true that Christ is a priest; but He is a priest not for Himself but for us, when in the name of the whole human race He offers our prayers and religious homage to the eternal Father; He is also a victim and for us since He substitutes Himself for sinful man. Now the exhortation of the Apostle, "Let this mind be in you which was also in Christ Jesus," requires that all Christians should possess, as far as is humanly possible, the same dispositions as those which the divine Redeemer had when He offered Himself in sacrifice: that is to say, they should in a humble attitude of mind, pay adoration, honor, praise and thanksgiving to the supreme majesty of God. Moreover, it means that they must assume to some extent the character of a victim, that they deny themselves as the Gospel commands, that freely and of their own accord they do penance and that each detests and satisfies for his sins. It means, in a word, that we must all undergo with Christ a mystical death on the cross so that we can apply to ourselves the words of St. Paul, "With Christ I am nailed to the cross."[81]

82. The fact, however, that the faithful participate in the eucharistic sacrifice does not mean that they also are endowed with priestly power. It is very necessary that you make this quite clear to your flocks.

83. For there are today, Venerable Brethren, those who, approximating to errors long since condemned[82] teach that in the New Testament by the word "priesthood" is meant only that priesthood which applies to all who have been baptized; and hold that the command by which Christ gave power to His apostles at the Last Supper to do what He Himself had done, applies directly to the entire Christian Church, and that thence, and thence only, arises the hierarchical priesthood. Hence they assert that the people are possessed of a true priestly power, while the priest only acts in virtue of an office committed to him by the community. Wherefore, they look on the eucharistic sacrifice as a "concelebration," in the literal meaning of that term, and consider it more fitting that priests should "concelebrate" with the people present than that they should offer the sacrifice privately when the people are absent.

84. It is superfluous to explain how captious errors of this sort completely contradict the truths which we have just stated above, when treating of the place of the priest in the Mystical Body of Jesus Christ. But we deem it necessary to recall that the priest acts for the people only because he represents Jesus Christ, who is Head of all His members and offers Himself in their stead. Hence, he goes to the altar as the minister of Christ, inferior to Christ but superior to the people.[83] The people, on the other hand, since they in no sense represent the divine Redeemer and are not mediator between themselves and God, can in no way possess the sacerdotal power.