CCC 1545 The redemptive sacrifice of Christ is unique, accomplished once for all; yet it is made present in the Eucharistic sacrifice of the Church. The same is true of the one priesthood of Christ; it is made present through the ministerial priesthood without diminishing the uniqueness of Christ’s priesthood: “Only Christ is the true priest, the others being only his ministers.”¹

CCC 1546 Christ, high priest and unique mediator, has made of the Church “a kingdom, priests for his God and Father.”² The whole community of believers is, as such, priestly. The faithful exercise their baptismal priesthood through their participation, each according to his own vocation, in Christ’s mission as priest, prophet, and king. Through the sacraments of Baptism and Confirmation the faithful are “consecrated to be. .. a holy priesthood.”³

1 St. Thomas Aquinas, Hebr. 8,4.
2 Rev 1:6; cf. Rev 5:9-10; 1 Pet 2:5,9.
3 LG 10 § 1.