2nd Reading for the 5th Sunday of Easter

From: 1 Peter 2:4-9

The Priesthood Common to All Believers

[4] Come to Him, to that living stone, rejected by men but to God's sight chosen and precious; [5] and like living stones be yourselves built into a spiritual house, to be a holy priesthood, to offer spiritual sacrifices acceptable to God through Jesus Christ. [6] For it stands in Scripture: "Behold, I am laying in Zion a stone, a cornerstone chosen and precious, and he who believes in Him will not be put to shame." [7] To you therefore who believe, He is precious, but for those who do not believe, "The very stone which the builders rejected has become the head of the corner," [8] and "A stone that will make men stumble, a rock that will make them fall"; for they stumble because they disobey the Word, as they were destined to do.

[9] But you are a chosen race, a royal priesthood, a holy nation, God's own people, that you may declare the wonderful deeds of Him who called you out of darkness into His marvelous light.
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Commentary:

4-10. Baptism makes us members of the Church. The sacred writer uses the idea of constructing a building (verses 4-8) to explain that Christians together go to make up the one, true people of God (verses 9-19). The whole passage is built on quotations from the Old Testament, possibly ones used in early apostolic catechesis.

The Church is like a spiritual building of which Christ is the cornerstone, that is, the stone which supports the entire structure (cf. "Lumen Gentium", 6). Christians have to be living stones united to Christ by faith and grace, thereby forming a solid temple in which "spiritual sacrifices" are offered which are "acceptable to God" (verse 5). The closer their union with Christ, the stronger the building: "All of us who believe in Christ Jesus", Origen explains, "are called 'living stones' [...]. For if you, who are listening to me, want to prepare yourself better for the construction of this building, and be one of the stones closest to the foundation, you need to realize that Christ Himself is the foundation of the building we are describing. As the Apostle Paul tells us, 'no other foundation can any one lay than that which is laid, which is Jesus Christ' (1 Corinthians 3:11)" ("In Iesu Nave", 9, 1).

8. Applying to Christ what the prophet Isaiah says of Yahweh (cf. Isaiah 8:14; note on 1 Peter 2:13), St. Peter shows how, for those who do not believe in Christ, the cornerstone becomes "a stone that will make men stumble, a rock that will make them fall"; Simon prophesied as much to the Blessed Virgin in the temple (cf. Luke 2:34).

"As they were destined to do": this does not mean that God predestined some to damnation. God wants all men to be saved (cf. 1 Timothy 2:4), and that was why Jesus Christ became man; but for someone to be saved, his free response is necessary, and man can oppose God's salvific plan and reject grace. It should be remembered that in the language of the Bible, particularly the Old Testament, sometimes no distinction is made between what God orders or wills and what He simply allows to happen (cf. Romans 9:14-33 and notes on the same.

9-10. In contrast with those who reject faith (verses 7-8), believers form the true Israel, the true people of God. In this people the titles applied to Israel in the Old Testament find their full meaning: they are "a chosen race" (cf. Exodus 19:5-6), a people convoked by God to sing His praises (cf. Isaiah 43:20-21). Their election is something Christians should glory in; it makes demands on them: Christians are set apart for God, they belong to Him (cf. 1 Corinthians 6:19), for the blood of Christ has been paid as their ransom (cf. 1 Peter 1:18-21). So, they must not remain passive; they have to preach the greatness of God and bring many other souls to Him: "the Good News of the Kingdom which is coming and which has begun is meant", says Pope Paul VI, "for all people of all times. Those who have received the Good News and who have been gathered by it into the community of salvation can and must communicate and spread it" ("Evangelii Nuntiandi", 13).

In this people there is only one priest, Jesus Christ, and one sacrifice, that which He offered on the cross and which is renewed in the Mass. But all Christians, through the sacraments of Baptism and Confirmation, obtain a share in the priesthood of Christ and are thereby equipped to mediate in a priestly way between God and man and to take an active part in divine worship; by so doing they can turn all their actions into "spiritual sacrifices acceptable to God" (1 Peter 2:5). Theirs is a true priesthood, although it is essentially different from the ministerial priesthood for those who receive the sacrament of Order: "Though they differ essentially and not only in degree, the common priesthood of the faithful and the ministerial or hierarchical priesthood are nonetheless ordered one to another; each in its own proper way shares in the one priesthood of Christ. The ministerial priest, by the sacred power that he has, forms and rules the priestly people; in the person of Christ he effects the eucharistic sacrifice and offers it to God in the name of all the people. The faithful indeed, by virtue of their royal priesthood, participate in the offering of the Eucharist. They exercise that priesthood, too, by the reception of the Sacraments, prayer and thanksgiving, the witness of a holy life, abnegation and active charity" (Vatican II, "Lumen Gentium", 10: cf. "Prebyterorum Ordinis", 2).

And the same Council says, apropos of those "spiritual sacrifices" (verse 5) by which Christians sanctify the world from within, that "all their works, prayers and apostolic undertakings, family and married life, daily work, relaxation of mind and body, if they are accomplished in the Spirit--indeed even the hardships of life if patiently borne--all these become spiritual sacrifices acceptable to God through Jesus Christ. In the celebration of the Eucharist these may most frequently be offered to the Father along with the body of our Lord. And so, worshipping everywhere by their holy actions, the laity consecrate the world itself to God" ("Lumen Gentium", 34).
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Source: "The Navarre Bible: Text and Commentaries". Biblical text taken from the Revised Standard Version and New Vulgate. Commentaries made by members of the Faculty of Theology of the University of Navarre, Spain. Published by Four Courts Press, Kill Lane, Blackrock, Co. Dublin, Ireland. Reprinted with permission from Four Courts Press and Scepter Publishers, the U.S. publisher.