The Bible says God is holy, holy, holy, repeating it three times for emphasis to make sure we get the point. God is not merely holy – that is, virtuous – nor is he holy times two, but he is holy times three. He is holy, holy, holy.
When referring to God as holy, holy, holy it is to worship him. This occurs two times in the Bible, appropriately enough once in the Old Testament (Isaiah 6:2-3) and once in the New Testament (Revelations 4:8). Therefore, both the old covenant and the new covenant view God as holy, holy, holy; it’s not just an Old Testament thing or just a New Testament thing. Furthermore, in Revelation, they say this over and over, never stopping.
The interesting thing is who is worshipping God by calling him “holy, holy, holy.” It is not people but spiritual beings. They are six winged creatures, which Isaiah calls seraphim.
Emerging from the spiritual realm, these beings, who surely know God better than we do, revere him as holy, holy, holy. They acknowledge him as holy, holy, holy. They praise him as holy, holy, holy.
May we do the same.