God is beautiful in His holiness. That is what the Bible says. The Bible talks about the beauty of God's holiness. The implies that God is beautiful in holiness. The holy nature of God is beautiful. Our God is holy and He is beautiful beyond measure.
To worship God, we must worship Him in spirit and in truth. We must worship Him with a deep understanding of who He is. We must worship Him in a spiritual way. That is what it means to worship God in the beauty of His holiness - it is worshiping Him in a spiritual way.
Before we can worship God in a spiritual way, we must be well acquainted with Him. We will understand Him perfectly. When we know what our God can do and the marvelous wonders of His grace, we will be able to worship him deep in our spirit.
Worship of God should not just be a superficial activity. We should not worship God by making physical shows. We must understand what it means to worship God in the spiritual way. We must worship God according to the spirit