'Whatever I command you, be careful to observe it; you shall not add to it nor take away from it'. Deuteronomy 1232. The authors of the Westminster Confession of Faith included this principle in their discussion of worship, writing, the acceptable way of worshipping the true God is instituted by Himself and so limited by His own revealed will, that He may not be worshipped according to the imaginations and devices of men, or the suggestions of Satan, under any visible representation, or any other way not prescribed in the Holy Scripture.

In this modern age, most Christians give little thought to the idea that there may be an 'acceptable' and an 'unacceptable' way to worship God. Worship, for most modern believers, is a matter of personal preference. This only highlights how far the church has fallen since the great attainments of the Reformation. The preferences of men are highly regarded, but no one stops to ask the all important questions: what is the preference of God? What does God find acceptable in his worship? What does He regard as unacceptable and how can we know?" (Douglas Comin, Worship: From Genesis to Revelation, p.1)