20. The Council's Decree on Priestly Life and Ministry gives us a particularly rich and thought - provoking synthesis of the priest's "spiritual life" and of the gift and duty to become "saints": "By the sacrament of orders priests are configured to Christ the priest so that as ministers of the head and co - workers with the episcopal order they may build up and establish his whole body which is the Church. Like all Christians they have already received in the consecration of baptism the sign and gift of their great calling and grace which enables and obliges them even in the midst of human weakness to seek perfection (cf. 2 Cor. 12:9), according to the Lord's word: 'You, therefore, must be perfect, as your heavenly Father is perfect' (Mt. 5:48). But priests are bound in a special way to strive for this perfection, since they are consecrated to God in a new way by their ordination. They have become living instruments of Christ the eternal priest, so that through the ages they, can accomplish his wonderful work of reuniting the whole human race with heavenly power. Therefore, since every priest in his own way represents the person of Christ himself, he is endowed with a special grace. By this grace the priest, through his service of the people committed to his care and all the People of God, is able the better to pursue the perfection of Christ, whose place he takes. The human weakness of his flesh is remedied by the holiness of him who became for us a high priest 'holy, innocent, undefiled, separated from sinners' (Heb. 7:26)."( ⁴¹)

The Council first affirms the "common" vocation to holiness. This vocation is rooted in baptism, which characterizes the priest as one of the "faithful" (Christifedelis), as a "brother among brothers," a member of the People of God, joyfully sharing in the gifts of salvation (cf. Eph. 4:4-6) and in the common duty of walking "according to the Spirit" in the footsteps of the one master and Lord. We recall the celebrated words of St. Augustine: "For you I am a bishop, with you I am a Christian. The former title speaks of a task undertaken, the latter of grace; the former betokens danger, the latter salvation."( ⁴²)

With the same clarity the conciliar text also speaks of a "specific" vocation to holiness, or more precisely of a vocation based on the sacrament of holy orders -- as a sacrament proper and specific to the priest -- and thus involving a new consecration to God through ordination. St. Augustine also alludes to this specific vocation when, after the words "For you I am a bishop, with you I am a Christian, he goes on to say: "If therefore it is to me a greater cause for joy to have been rescued with you than to have been placed as your leader, following the Lord's command, I will devote myself to the best of my abilities to serve you, so as not to show myself ungrateful to him who rescued me with that price which has made me your fellow servant."( ⁴³)

The conciliar text goes on to point out some elements necessary for defining what constitutes the "specific quality" of the priest's spiritual life. These are elements connected with the priest's "consecration," which configures him to Christ the head and shepherd of the Church, with the "mission" or ministry peculiar to the priest; which equips and obliges him to be a "living instrument of Christ the eternal priest" and to act "in the name and in the person of Christ himself" and with his entire "life," called to manifest and witness in a fundamental way the "radicalism of the Gospel."( ⁴⁴)