 You can sing without a revelation. You can dance without a revelation. You can clap and shout without a revelation. But you can't truly worship without a revelation. For all true worship is a response to a revelation of God. Worship is when I give God glory as I see God's glory. And only the Holy Spirit can reveal that glory. For God is spirit, so those who worship Him must worship in spirit and in truth. The Holy Spirit takes the word, or truth, and brings forth revelation. So it is the spirit and the word that brings forth true worship.