The worship of Westminster Abbey on state occasions is impressively regal but it may not be acceptable to the Lord. The things that please US most may seem to GOD to be disgusting and boring, says Calvin on John 4. Not whether unconverted visitors feel happy in our midst. In the NT the unconverted Jews did not feel at home in Christian worship services. Biblical Principles concerning the worship that God requires.
Worship is required of all men.
In Romans 1 the first sin the Gentiles are accused of is that they did not glorify God as God but they worshipped idols. Worship is a response to a revelation of God of himself. The Gentiles knew God but did not glorify him as God. We must worship the God revealed in Jesus of Nazareth. Our worship must be commensurate with this life.