18 For you have not come to what may be touched, a blazing fire and darkness and gloom and a tempest 19 and the sound of a trumpet and a voice whose words made the hearers beg that no further messages be spoken to them. 20 For they could not endure the order that was given, “If even a beast touches the mountain, it shall be stoned.” 21 Indeed, so terrifying was the sight that Moses said, “I tremble with fear.” 22 But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to innumerable angels in festal gathering, 23 and to the assembly[a] of the firstborn who are enrolled in heaven, and to God, the judge of all, and to the spirits of the righteous made perfect, 24 and to Jesus, the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.
25 See that you do not refuse him who is speaking. For if they did not escape when they refused him who warned them on earth, much less will we escape if we reject him who warns from heaven. 26 At that time his voice shook the earth, but now he has promised, “Yet once more I will shake not only the earth but also the heavens.” 27 This phrase, “Yet once more,” indicates the removal of things that are shaken—that is, things that have been made—in order that the things that cannot be shaken may remain. 28 Therefore let us be grateful for receiving a kingdom that cannot be shaken, and thus let us offer to God acceptable worship, with reverence and awe, 29 for our God is a consuming fire.
Excerpt from Hebrews, chapter 12
At the outset we [Lutherans] must again make the preliminary statement that we1 do not abolish the Mass, but religiously maintain and defend it. For among us masses are celebrated every Lord’s Day and on the other festivals, in which the Sacrament is offered to those who wish to use it, after they have been examined and absolved. And the usual public ceremonies are observed, the series of lessons, of prayers, vestments, and other like things.
Of the Term Mass.
78 The adversaries also refer us to philology. From the names of the Mass they derive arguments which do not require a long discussion. For even though the Mass be called a sacrifice, it does not follow that it must confer grace ex opere operato, or, when applied on behalf of others, merit for them the remission of sins, etc.
79 Leitourgia, [liturgy] they say, signifies a sacrifice, and the Greeks call the Mass, liturgy. Why do they here omit the old appellation synaxis, which shows that the Mass was formerly the communion of many? But let us speak of the word liturgy.
80 This word does not properly signify a sacrifice, but rather the public ministry, and agrees aptly with our belief, namely, that one minister who consecrates tenders the body and blood of the Lord to the rest of the people, just as one minister who preaches tenders the Gospel to the people, as Paul says, 1 Cor. 4:1: Let a man so account of us as of the ministers of Christ and stewards of the mysteries of God, i.e., of the Gospel and the Sacraments. And 2 Cor. 5:20: We are ambassadors for Christ, as81 though God did beseech you by us; we pray you in Christ’s stead, Be ye reconciled to God. Thus the term leitourgia agrees aptly with the ministry.
Excerpts from the Apology of the Augsburg Confession, Article XXIV