“The second note is this: In the matters of worship, God stands upon little things.
Such things as seem to be very small and little to us, yet God stands much upon them in the matter of worship, for there is nothing wherein the prerogative of God more appears than in worship. Princes stand much upon their prerogatives. Now God has written the law of natural worship in our hearts. But there are other things in the worship of God that are not written in our hearts, that only depend upon the will of God revealed in His Word, which would not be duties except that they are revealed in His Word. And these are of such a nature as we can see no reason for them except this, that God would have them. As now, there are many kinds of ceremonies to manifest honor to princes that have no reason at all, but merely because it is a civil institution so appointed. So God would have some ways of honoring Himself that the creature should not see the reason for, but merely the will of God to have them so.
Now God stands much upon little things, though men would think it a little matter whether this fire or that fire, and will not this burn as well as that? But God stands upon it. And so for the ark. When Uzza did but touch the ark when it was ready to fall, we would think it no great matter, but one touch of the ark cost him his life. There is not any one small thing in the worship of God but God stands mightily upon it.
In the matter of the Sabbath, that’s His worship. For a poor man to gather a few sticks, what great matter is it? But God stands upon it. And so when the men of Beth-shemesh did but look upon the ark, it cost the lives of fifty thousand threescore and ten men. If it is a matter of a holy thing that concerns His worship, He would not have it abused in anything. Let us learn to make conscience of little things in the worship of God and not to think, “Oh, how nice such are, and how precise and nice in such small things!” You do not understand the nature of Divine worship if so be that you are not nice about it. God is nice and stands upon little things in the matter of His worship.”
~Jeremiah Burroughs, Gospel Worship
Source: https://puritanboard.com/threads/history-of-instruments.93085/page-2, Comment 50