Catechism of the Council of Trent: Holy Orders
Bishops
The second is that of Bishops, who are placed over the various dioceses to govern not only the other ministers of the Church, but the faithful also, and to promote their salvation with supreme vigilance and care. Hence it is that in Sacred Scripture they are often called pastors of the sheep. Their office and duty has been well described by St. Paul in his sermon to the Ephesians, as we read in the Acts of the Apostles; while St. Peter, the Prince of the Apostles, has also laid down a divine rule for the exercise of the episcopal office. And if Bishops strive to conform their actions according to this rule, there can be no doubt that they will be good pastors and will be also esteemed as such. Bishops are also called pontiffs. This name is derived from the pagans, who thus designated their chief priests.
Archbishops
The third degree is that of Archbishops, who preside over a number of Bishops and who are called Metropolitans, because they are Bishops of those cities which are regarded as the metropolis of their respective provinces. Hence they enjoy greater dignity and more extensive power than Bishops, although their Ordination is the same.
Patriarchs
In the fourth degree come Patriarchs, that is to say, the first and highest of the Fathers. Formerly, besides the Roman Pontiff, there were in the universal Church only four Patriarchs, who, however, were not of equal dignity. Thus Constantinople, though it reached the patriarchal honour only after all the others, yet it obtained a higher rank by reason of being the capital of the Empire. Next in rank came the Patriarch of Alexandria, which Church had been founded by St. Mark the Evangelist by order of the Prince of the Apostles. The third was that of Antioch, where Peter fixed his first See. Finally, that of Jerusalem, a See first governed by James, the brother of our Lord.
The Pope
Above all these, the Catholic Church has always placed the Supreme Pontiff of Rome, whom Cyril of Alexandria, in the Council of Ephesus, named the Chief Bishop, Father and Patriarch of the whole world. He sits in that chair of Peter in which beyond every shadow of doubt the Prince of the Apostles sat to the end of his days, and hence it is that in him the Church recognises the highest degree of dignity, and a universality of jurisdiction derived, not from the decrees of men or Councils, but from God Himself. Wherefore he is the Father and guide of all the faithful, of all the Bishops, and of all the prelates, no matter how high their power and office; and as successor of St. Peter, as true and lawful Vicar of Christ our Lord, he governs the universal Church.
From what has been said, therefore, pastors should teach what are the principal duties and functions of the various ecclesiastical orders and degrees, and also who is the minister of this Sacrament.
The Minister of Holy Orders
Beyond all doubt, it is to the Bishop that the administration (of orders) belongs, as is easily proved by the authority of Holy Scripture, by most certain tradition, by the testimony of all the Fathers, by the decrees of the Councils, and by the usage and practice of Holy Church.
It is true that permission has been granted to some abbots occasionally to administer those orders that are minor and not sacred; yet there is no doubt whatever that it is the proper office of the Bishop, and of the Bishop alone to confer the orders called holy or major.
To ordain subdeacons, deacons and priests, one Bishop suffices; but in accordance with an Apostolic tradition that has been always observed in the Church, Bishops are consecrated by three Bishops.
The Recipient of Holy Orders
We now come to indicate who are fit to receive this Sacrament, and especially the priestly order, and what are the principal dispositions required of them.
From (what we shall lay down concerning the dispositions requisite for the priesthood) it will be easy to determine what ought to be observed in conferring the other orders, due account being taken of the office and dignity of each. Now the extreme caution that should be used in conferring this Sacrament is gathered from the fact that, while all the other Sacraments impart grace to the recipient for his own use and sanctification, he, on the other hand, who receives Holy Orders is made partaker of heavenly grace precisely that by his ministry he may promote the welfare of the Church and therefore of all mankind.
Hence we readily understand why it is that ordinations take place only on special days, on which, moreover, in accordance with a very ancient practice of the Catholic Church, a solemn fast is appointed in order that by holy and fervent prayer the faithful may obtain from God ministers who will be well qualified to exercise properly and to the advantage of the Church the power of so great a ministry.
Qualifications for the Priesthood
Holiness Of Life
The chief and most necessary quality requisite in him who is to be ordained a priest is that he be recommended by integrity of life and morals: first because, by procuring or permitting his ordination while conscious of mortal sin, a man renders himself guilty of a new and enormous crime; and secondly, because the priest is bound to give to others the example of a holy and innocent life.
In this connection pastors should set forth the rules which the Apostle laid down to Titus and Timothy, and he should also explain that those bodily defects, which, by the Lord's command excluded from the service of the altar in the Old Law, should for the most part be understood of deformities of soul in the New Law. This is why the holy custom has been established in the Church that he who is about to be admitted to orders should first take great care to cleanse his conscience in the Sacrament of Penance.
Competent Knowledge
In the second place there is required of the priest not only that knowledge which concerns the use and administration of the Sacraments; but he should also be versed in the science of Sacred Scripture, so as to be able to instruct the people in the mysteries of the Christian faith and the precepts of the divine law, lead them to piety and virtue, and reclaim them from sin.
The priest's duties are twofold. The first is to consecrate and administer the Sacraments properly; the second is to instruct the people entrusted to him in all that they must know or do in order to be saved. Hence the words of the Prophet Malachias: The lips of the priest shall keep knowledge, and they shall seek the Law at his mouth; because he is the angel of the Lord of hosts.
Now to fulfil the first of these duties it is enough for him to be endowed with a moderate share of knowledge. As for the second, it is no mere ordinary, but very special knowledge that is required. At the same time, however, it should be remembered that a profound knowledge of abstruse questions is not demanded of all priests in an equal degree. It is enough that each one knows all that is necessary for the discharge of his office and ministry.
Canonical Fitness
This Sacrament should not be conferred on children, nor on the insane or mad, because they are devoid of the use of reason. Yet if it does happen to be administered to them, we must unhesitatingly believe that the sacramental character becomes impressed on their souls. As for the precise age requisite for the reception of the various orders, this will easily be found in the decrees of the Council of Trent.
Slaves also are excluded. He who is not his own master and who is in the power of another, should not be dedicated to the divine service.
Homicides and men of blood are also rejected, because they are excluded by a law of the Church and are declared irregular.
The same must be said of the illegitimate and of all those not born in lawful wedlock. It is only right that those who are dedicated to the divine service should have nothing in them which could expose them to the well-deserved derision or contempt of others.
Finally, those who are notably maimed or deformed should not be admitted. A defect or deformity of this kind cannot but offend the eye and stand in the way of the due administration of the Sacraments.
Effects of Holy Orders
This much being explained, it now remains for pastors to point out the effects of this Sacrament. It is evident that the Sacrament of Orders, while mainly concerned, as already explained, with the welfare and beauty of the Church, nevertheless also confers on the soul of him who is ordained the grace of sanctification, fitting and qualifying him for the proper discharge of his functions and for the administration of the Sacraments, in the same way as by the grace of Baptism each one is qualified to receive the other Sacraments.
Another grace is clearly conferred by this Sacrament; namely, a special power with reference to the most Blessed Sacrament of the Eucharist. This power is full and perfect in the priest, because he alone can consecrate the body and blood of our Lord; but it is greater or less in the inferior ministers in proportion as their ministry approaches the Sacrament of the Altar.
This power is also called a spiritual character, because those who have been ordained are distinguished from the rest of the faithful by a certain interior mark impressed on the soul, by which they are dedicated to the divine worship. It is this grace which the Apostle seems to have had in view when he said to Timothy: Neglect not the grace that is in thee, which was given thee by prophecy, with imposition of hands of the priesthood; and again: I admonish thee, that thou stir up the grace of God which is in thee by the imposition of my hands.
Admonition
This much will suffice for the Sacrament of Orders. We have aimed at presenting nothing more than the principal points that bear on the subject, so as to supply the pastor with sufficient matter for instructing the faithful, and directing them to Christian piety.