In his commentary titled L’epitre aux Hebreux, (Tome II, page 144f), Ceslaus Spicq, O.P. says the author of the letter calls the Hebrews to more profoundly comprehend that righteousness, the power to bear the fruits of holiness, does not come in any way from the law, but only from the priestly mediation of Christ. That is, the righteousness of Christ’s followers, in their very being and in their daily actions, is an outcome of his passion, death and resurrection, which are the supreme expression of his priesthood. Christ is the priest, and Christ is the victim offered to God. Because of this priestly mediation, the Hebrews through their union with Christ by faith and baptism have been able to “taste the powers of the age to come” (Heb. 6:5). “To taste” in this sense means to experience directly for oneself. They have known the power of the righteousness of God in their own lives. The author of the letter urges them to continue in his righteousness, and “go on to maturity” (Heb. 6:1).