Chapter 21 — Part II: The Sacraments — Holy Orders
Section 15. But those who desire to receive the Sacrament of Orders, should aim not only at seeking the glory of God in all things-an obligation admittedly common to all men, and particularly to the faithful -- but also to serve Him in holiness and justice in whatever sphere of His ministry they may be placed. Just as in the army all the soldiers obey the general's orders, though they all have not the same functions to discharge, one being a centurion, another a prefect, so in like manner, though all the faithful should diligently practice piety and innocence, which are the chief means of honouring God, yet they who are in Holy Otters have certain special duties and functions to discharge in the Church. Thus they offer Sacrifice for themselves and for all the people; they explain God's law and exhort and form the faithful to observe it promptly and cheerfully; they administer the Sacraments of Christ our Lord by means of which all grace is conferred and increased; and, in a word, they are separated from the rest of the people to fill by far the greatest and noblest of all ministries.