Heb 4, 14 We have a great high priest

(Heb 4, 14) We have a great high priest
[14] Therefore, since we have a great high priest who has passed through the heavens, Jesus, the Son of God, let us hold fast to our confession.

(CCC 1544) Everything that the priesthood of the Old Covenant prefigured finds its fulfillment in Christ Jesus, the "one mediator between God and men" (2 Tim 2:5). The Christian tradition considers Melchizedek, "priest of God Most High," as a prefiguration of the priesthood of Christ, the unique "high priest after the order of Melchizedek" (Heb 5:10; cf. 6:20; Gen 14:18); "holy, blameless, unstained" (Heb 7:26), "by a single offering he has perfected for all time those who are sanctified" (Heb 10:14), that is, by the unique sacrifice of the cross. (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" (St. Thomas Aquinas, Hebr 8, 4). (CCC 1546) Christ, high priest and unique mediator, has made of the Church "a kingdom, priests for his God and Father" (Rev 1:6; cf. Rev 5:9-10; 1 Pet 2:5, 9). 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" (LG 10 § 1).