I am going to lay out some facts that I am sure some of our new posters are not going to like or accept.
1) Traditional church musical instruments were a commodity on the American frontier.* Some people came to view them as an unnecessary luxury, and disdained them. Well, in some parts of the the Restoration groups, no one wants to concede that they have an opinion. They want to claim that everything they teach comes from Scripture. So, they noticed that the New Testament does not mention their use in assembled worship explicitly, and on the basis of this added a ban against them. Had musical instruments not been a commodity on the American frontier, it is unlikely anyone would have thought a thing of musical instruments.
2) Acts 2:46 reports Christians “day by day, attending the temple together” (ESV); daily temple services had choirs singing with instrumental accompaniment.** When those Christians went to the temple services together to worship, musical instruments were used.
3) New Testament-era Revelation 5:8-14 reports John present with “elders” = congregation leaders “each holding a harp” (ESV) as they “sing” (ASV) to the Lord. It is unrealistic to think “sing” means the harps were not used for their purpose. John did not run away from this worship assembly, nor did he suggest there was anything wrong.
4) Per 2 Timothy 3:16-7, the Scriptures were written "so that the| person who serves God| may be complete, | entirely instructed for all good work.”^* It was written so that the individual Christian can know every good thing s/he should do. It was not written to fulfill every religious curiosity of mortals. Many Church of Christ people place central importance on their group meetings, and cannot imagine that God did not think the group meeting was as important as they think. They assume that God gave them everything they need to fulfill their curiosity about how New Testament era congregations operated their meetings. In reality, the events of congregational meetings were of little importance in Scripture -- so little so that we cannot reconstruct without conjecture even one meeting in order from start to finish. The New Testament is not a `congregation meeting handbook.'
5) The Old Covenant Law is enclosed between Genesis and Deuteronomy. Psalm 150, which invites worship with musical instruments from "everything that hath breath" is not in the Old Covenant Law. As Psalm 150 was written to "everything that hath breath" that would include Jew and Gentile; as this was for Gentiles, it cannot be of the Judaic Law. Therefore, Psalm 150 was not done away with at the cross.
6) There is absolutely nothing in Scripture where God expresses that He has changed His mind.
7) There is no authority for mortals to add a ban against what God invited.
8) The 1906 split of the Churches of Christ against the Restoration movement was mainly prompted by the former's desire to be a separate group from those who did not agree with them on their silence ban. Group matters are very important to many Church of Christ people; to many of them, their group is the center of their religious life. A reason why so many Church of Christ people are so persistent in their belief despite the baselessness of it is to defend the actions of their predecessors. If their predecessors were wrong, then the factioning away was wrong, meaning that their group made a mistake. They do not wish to accept that such a thing has happened.
The use of musical instruments to accompany congregational singing does not need to be defended. From what I see in Scripture, congregations can use musical instruments, and congregations can choose not to use musical instruments. There is no authority to outright ban a practice which God invites and which God has shown approval of in both the Old and New Testaments.
We will never convince them to abandon one of their group's `founding precepts.' However, in the end, they are stepping outside the authority of Scripture in adding a ban against something God time and again shows approval of.
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* J. North, Union in Truth, page 248.
** Punton, The World Jesus Knew, pages 124-125.
^* NBV|ICB|ASV|RVR 1909 “enteramente instruído para toda buena obra” translated.