The Holy of Holies
The Heavenly Father is so Holy, Angels rarely trod where He is.
When Angels do, which is rarely, They fall on their faces before Him.
The Heavenly Father's Feet have never touch earthly soil.
Even on the Mount of Transfiguration, He did not appear physically, but His Voice spoke from a cloud.
Jesus said, all that worship Him must worship Him in Spirit and truth.
The Father is the Holy of Holies.
All who are born of Him shall be Holy.
Hence, He is the Holy of Holies, King of Kings.