Priests are made in the likeness of Christ the Priest by the Sacrament of Orders, so that they may, in collaboration with their bishops, work for the building up and care of the Church which is the whole Body of Christ, acting as ministers of him who is the Head. Like all other Christians they have received in the sacrament of Baptism the symbol and gift of such a calling and such grace that even in human weakness they can and must seek for perfection, according to the exhortation of Christ: Be you therefore perfect, as your heavenly Father is perfect. Priests are bound, however, to acquire that perfection in special fashion. They have been consecrated by God in a new manner at their ordination and made living instruments of Christ the Eternal Priest that they may be able to carry on in time his marvelous work whereby the entire family of man is again made whole by power from above. Since, therefore, every priest in his own fashion acts in place of Christ himself, he is enriched by a special grace, so that, as he serves the flock committed to him and the entire People of God, he may the better grow in the grace of him whose tasks he performs, because to the weakness of our flesh there is brought the holiness of him who for us was made a High Priest holy, guiltless, undefiled not reckoned among us sinners.