A few thoughts from awhile back

John 4:24 "God is spirit, and His worshipers must worship in spirit and in truth."

Romans 12:1-2 "Therefore, I urge you, brothers, in view of God's mercy, to offer your bodies as living sacrifices, holy and pleasing to God - this is your spiritual act of worship."

Philippians 3:2-3 "For it is we who are the circumcision, we who worship by the Spirit of God, who glory in Christ Jesus, and who put no confidence in the flesh."

Hebrews 12:28-29 "Therefore, since we are receiving a kingdom that cannot be shaken, let us be thankful, and so worship God acceptably with reverence and awe, for our 'God is a consuming fire.'"

The Augsburg Confession, Articles in Which an Account is Given of the Abuses Which Have Been Corrected also has this to say:

“For Your Imperial Majesty will undoubtedly find that the form of doctrine and of ceremonies with us is not so intolerable as these ungodly and malicious men represent. Besides, the truth cannot be gathered from common rumors or the revilings of enemies. But it can readily be judged that nothing would serve better to maintain the dignity of ceremonies, and to nourish reverence and pious devotion among the people than if the ceremonies were observed rightly in the churches.”

And from the Apology of the Augsburg Confession, VII and VIII:

“But just as the dissimilar length of day and night does not injure the unity of the Church, so we believe that the true unity of the Church is not injured by dissimilar rites instituted by men; although it is pleasing to us that, for the sake of tranquillity [unity and good order], universal rites be observed, just as also in the churches we willingly observe the order of the Mass, the Lord's Day, and other more eminent festival days. And with a very grateful mind we embrace the profitable and ancient ordinances, especially since they contain a discipline by which it is profitable to educate and train the people and those who are ignorant….”