John MacArthur on 1 Corinthians 14:40-
Summing it up, Paul says,
“Let all things be done decently and in order.” The word “decently” refers to harmony and beauty, and the word “order” refers to things being done in sequence. Well, since God is a God of harmony, beauty, and order, Paul says, “Let your assembling together manifest those characteristics of God.”
And as the church manifests God and is edified, it will also be multiplied.
That’s God’s promise.
Knowing God through His Word ... Day by Day 