Some comments I ran across, copied and have forgotten where I found them, on (1) the first day of the week, and (2) church music.
“The first day of the week is set apart unto worship (Acts 20:7; 1 Cor. 16:1-2; Rev. 1:7) and it seems the entire day was set apart as a day of worship and fellowship (Acts 2:43-47; 20:7-10; 1 Cor. 14). Everything else as far as specific time for one aspect of worship is provided in the principle ‘Let all things be done decently and in order.’”
“No stated meeting should have elements that are not commanded. Here are two reasons: (1) A stated meeting is binding on the conscience for all members to be in attendance unless providence has prevented attendance. (2) The conscience of every member should be free from the commands of man in matters of worship when gathered together.”
“Johann Samuel Stryk (1668–1715) described church music in the early eighteenth century as (1) contrary to the genius of the New Testament church, and not agreeing with the example of the primitive church; (2) superfluous; (3) useless, as not promoting but impending divine worship; (4) superstitious, while men imagine that the glory of God can be promoted in this wise.”