III. The Three Degrees of the Sacrament of Holy Orders

From The Catechism of the Catholic Church

1567
“The priests, prudent cooperators of the episcopal college and its support
and instrument, called to the service of the People of God, constitute,
together with their bishop, a unique sacerdotal college (presbyterium)
dedicated, it is, true to a variety of distinct duties. In each local assembly
of the faithful they represent, in a certain sense, the bishop, with whom they
are associated in all trust and generosity; in part they take upon themselves
his duties and solicitude and in their daily toils discharge
them.”⁵¹ priests can exercise their ministry only in dependence on
the bishop and in communion with him. the promise of obedience they make to the
bishop at the moment of ordination and the kiss of peace from him at the end of
the ordination liturgy mean that the bishop considers them his co-workers, his
sons, his brothers and his friends, and that they in return owe him love and
obedience.

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION TWO THE SEVEN SACRAMENTS OF THE CHURCH
- CHAPTER THREE THE SACRAMENTS AT THE SERVICE OF COMMUNION
  - ARTICLE 6 THE SACRAMENT OF HOLY ORDERS
    - III. The Three Degrees of the Sacrament of Holy Orders

From The Catechism of the Catholic Church – rosary.team