Roman Catechism 21.55

Chapter 21 — Part II: The Sacraments — Holy Orders

Section 55. Functions of the Priesthood — The office of a priest, then, is to offer Sacrifice to God and to administer the Sacraments of the Church. This is proved by the very ceremonies used at his ordination. When-ordaining a priest, the Bishop first of all imposes hands on him, as do all the other priests who are present. Then he puts a stole on his shoulders and arranges it over his breast in the form of a cross, declaring thereby that the priest is clothed with power from on high, enabling him to carry the cross of Christ our Lord and the sweet yoke of God's law, and to inculcate this law not only by words, but also by the example of a most holy and virtuous life.