15. In their turn, the apostles, appointed by the Lord, progressively carried out their mission by calling -- in various but complementary ways -- other men as bishops, as priests and as deacons in order to fulfill the command of the risen Jesus who sent them forth to all people in every age.

The writings of the New Testament are unanimous in stressing that it is the same Spirit of Christ who introduces these men chosen from among their brethren into the ministry Through the laying on of hands (cf. Acts 6:6; 1 Tm. 4:14; 5:22; 2 Tm. 1:6) which transmits the gift of the Spirit, they are called and empowered to continue the same ministry of reconciliation, of shepherding the flock of God and of teaching (cf. Acts 20:28; 1 Pt. 5:2).

Therefore, priests are called to prolong the presence of Christ, the one high priest, embodying his way of life and making him visible in the midst of the flock entrusted to their care. We find this clearly and precisely stated in the first letter of Peter: "I exhort the elders among you, as a fellow elder and a witness of the sufferings of Christ as well as a partaker in the glory that is to be revealed. Tend the flock of God that is your charge, not by constraint but willingly, not for shameful gain but eagerly, not as domineering over those in your charge but being examples to the flock. And when the chief Shepherd is manifested you will obtain the unfading crown of glory" (1 Pt. 5:1-4).

In the Church and on behalf of the Church, priests are a sacramental representation of Jesus Christ -- the head and shepherd -- authoritatively proclaiming his word, repeating his acts of forgiveness and his offer of salvation -- particularly in baptism, penance and the Eucharist, showing his loving concern to the point of a total gift of self for the flock, which they gather into unity and lead to the Father through Christ and in the Spirit. In a word, priests exist and act in order to proclaim the Gospel to the world and to build up the Church in the name and person of Christ the head and shepherd.( ²⁷)

This is the ordinary and proper way in which ordained ministers share in the one priesthood of Christ. By the sacramental anointing of holy orders, the Holy Spirit configures them in a new and special way to Jesus Christ the head and shepherd; he forms and strengthens them with his pastoral charity; and he gives them an authoritative role in the Church as servants of the proclamation of the Gospel to every people and of the fullness of Christian life of all the baptized.

The truth of the priest as it emerges from the Word of God, that is, from Jesus Christ himself and from his constitutive plan for the Church, is thus proclaimed with joyful gratitude by the Preface of the liturgy of the Chrism Mass: "By your Holy Spirit you anointed your only Son high priest of the new and eternal covenant. With wisdom and love you have planned that this one priesthood should continue in the Church. Christ gives the dignity of a royal priesthood to the people he has made his own. From these, with a brother's love, he chooses men to share his sacred ministry by the laying on of hands. He appointed them to renew in his name the sacrifice of redemption as they set before your family his paschal meal. He calls them to lead your holy people in love, nourish them by your word and strengthen them through the sacraments. Father, they are to give their live in your service and for the salvation of your people as they strive to grow in the likeness of Christ and honor you by their courageous witness of faith and love."