Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption. I Corinthians 15:50
God [is] a Spirit: and they that worship him must worship [him] in spirit and in truth. John 4:24
But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his. And if Christ [be] in you, the body [is] dead because of sin; but the Spirit [is] life because of righteousness. Romans 8:9-19
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, [they] are spirit, and [they] are life. John 6:63
Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God. Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual. But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned. I Corinthians 2:12-14
And we see some of these things in Protestant churches as well music, flowers, mannerisms, clothing, intonations and the observance of the Lords Supper.
And we see similar things in the observance of the Sabbath by Jews and Torah observant Christians. The wine, the bread, the prayers, the candles, the intonations, etc.
Some Christians and Jews stand in awe of God when they hear or read the words of God, others in the presence of glorious scenes in nature, others when they hear beautiful music or a wonderful sermon or homily - and still others when they enter a particular house of worship or observe a particular work of art - and still others when they observe a particular ritual. God didnt make us with a cookie cutter. The important part is to worship God, to love Him surpassingly above all else.
The only time I become concerned is when the Christian seems unaware of analogical knowledge - which is to say, the picture of a man is not the man a sculpture of Christ on a Cross is not Christ on a Cross and so on. Such a one is probably still young in the faith and in need of further Spiritual nourishment.
To God be the glory!
Thank you so much for all of those wonderful scriptures. :) You are so right that God makes a clear distinction and that He explains what our hearts should be focused on, spiritual worship, as you said.