1005- CCC 1142, 1549,1561; 1143,903,1672 - 2 THE PASCHAL MYSTERY IN THE CHURCH'S SACRAMENTS

CCC 1142 But “the members do not all have the same function.”1 Certain members are called by God, in and through the Church, to a special service of the community. These servants are chosen and consecrated by the sacrament of Holy Orders, by which the Holy Spirit enables them to act in the person of Christ the head, for the service of all the members of the Church.2 The ordained minister is, as it were, an “icon” of Christ the priest. Since it is in the Eucharist that the sacrament of the Church is made fully visible, it is in his presiding at the Eucharist that the bishop’s ministry is most evident, as well as, in communion with him, the ministry of priests and deacons.
CCC 1549 Through the ordained ministry, especially that of bishops and priests, the presence of Christ as head of the Church is made visible in the midst of the community of believers.1 In the beautiful expression of St. Ignatius of Antioch, the bishop is typos tou Patros: he is like the living image of God the Father.2
1561 The above considerations explain why the Eucharist celebrated by the bishop has a quite special significance as an expression of the Church gathered around the altar, with the one who represents Christ, the Good Shepherd and Head of his Church, presiding.42
CCC 1143 For the purpose of assisting the work of the common priesthood of the faithful, other particular ministries also exist, not consecrated by the sacrament of Holy Orders; their functions are determined by the bishops, in accord with liturgical traditions and pastoral needs. “Servers, readers, commentators, and members of the choir also exercise a genuine liturgical function.”1
CCC 903 Lay people who possess the required qualities can be admitted permanently to the ministries of lector and acolyte.1 “When the necessity of the Church warrants it and when ministers are lacking, lay persons, even if they are not lectors or acolytes, can also supply for certain of their offices, namely, to exercise the ministry of the word, to preside over liturgical prayers, to confer Baptism, and to distribute Holy Communion in accord with the prescriptions of law.”2
CCC 1672 Certain blessings have a lasting importance because they consecrate persons to God, or reserve objects and places for liturgical use. Among those blessings which are intended for persons - not to be confused with sacramental ordination - are the blessing of the abbot or abbess of a monastery, the consecration of virgins and widows, the rite of religious profession and the blessing of certain ministries of the Church (readers, acolytes, catechists, etc.). The dedication or blessing of a church or an altar, the blessing of holy oils, vessels, and vestments, bells, etc., can be mentioned as examples of blessings that concern objects.