"Let all things be done decently and in order."
Paul ends the 14th chapter of 1 Corinthians with these words (above). Earlier, he had given specific instructions about Sunday church worship in the congregation (in Corinth). Though much of that detail is now abrogated, in that God's full written revelation is completed--all of it was to be done, "decently and in order."
The Lord is in no way a "kill-joy"; and His insistence on dignity and decorum in His worship is not designed to dishearten us. Instead, the exact opposite is true. God provides structure and order, so that in the church--particularly in Sunday worship--we have a practical "anchor," since we have to deal with a disordered and insane world (the rest of the week).
[Puritan quote of the day: "Flesh and blood may have its fears and disquiets, but grace checks them." --Thomas Watson, in, "The Art of Divine Contentment"]
