Affirmative Theses.
Concordia Triglotta, 1921 English text
3 1. For settling also this controversy we unanimously believe, teach, and confess that the ceremonies or church rites which are neither commanded nor forbidden in God’s Word, but have been instituted alone for the sake of propriety and good order, are in and of themselves no divine worship, nor even a part of it. Matt. 15:9:In vain they do worship Me, teaching for doctrines the commandments of men.
4 2. We believe, teach, and confess that the congregation of God of every place and every time has the power, according to its circumstances, to change such ceremonies in such manner as may be most useful and edifying to the congregation of God.
5 3. Nevertheless, that herein all frivolity and offense should be avoided, and special care should be taken to exercise forbearance towards the weak in faith. 1 Cor. 8:9; Rom. 14:13.
6 4. We believe, teach, and confess that in time of persecution, when a plain [and steadfast] confession is required of us, we should not yield to the enemies in regard to such adiaphora, as the apostle has written Gal. 5:1: Stand fast, therefore, in the liberty wherewith Christ hath made us free, and be not entangled again in the yoke of bondage. Also 2 Cor. 6:14: Be ye not unequally yoked together with unbelievers, etc. For what concord hath light with darkness? Also Gal. 2:5: To whom we gave place, no, not for an hour, that the truth of the Gospel might remain with you. For in such a case it is no longer a question concerning adiaphora, but concerning the truth of the Gospel, concerning [preserving] Christian liberty, and concerning sanctioning open idolatry, as also concerning the prevention of offense to the weak in the faith [how care should be taken lest idolatry be openly sanctioned and the weak in faith be offended]; in which we have nothing to concede, but should plainly confess and suffer on that account what God sends, and what He allows the enemies of His Word to inflict upon us.
7 5. We believe, teach, and confess also that no Church should condemn another because one has less or more external ceremonies not commanded by God than the other, if otherwise there is agreement among them in doctrine and all its articles, as also in the right use of the holy Sacraments, according to the well-known saying: Dissonantia ieiunii non dissolvit consonantiam fidei, Disagreement in fasting does not destroy agreement in faith.