Kadosh is the Hebrew word behind "holy," and the English has been sanitizing it for centuries. The root qof-dalet-shin means to set apart, to separate, to cut away from the common. It is not a moral quality in the way English uses "holy." It is a structural distinction. When HaShem declares Himself kadosh (Isaiah 6:3, where the seraphim cry "kadosh, kadosh, kadosh"), He is not saying "I am morally pure." He is saying "I am other. I am not like you. I am not like anything. I am separated from every category you have."

The KJV renders kadosh as "holy" throughout. The ESV, NASB, and NIV follow suit. None of them convey the physical, tangible sense of separation the Hebrew carries. "Holy" in English has become a church word: stained-glass windows, hushed tones, hands folded in prayer. It sounds religious. Kadosh does not sound religious. It sounds like a blade. It is the word used for the Holy of Holies, the space in the Temple literally cut off from everything else by a veil. It is the word used when HaShem commands Israel in Leviticus 19:2: "Be kadosh, for I am kadosh." He is not asking them to be pious. He is asking them to be distinct, separated from the patterns, priorities, and worship of every nation around them.

When the English reader sees "holy" and thinks moral purity, they lose the structural meaning entirely. Kadosh is not about being good. It is about being set apart for a specific purpose by the One who set you apart. The ground at the burning bush was not morally pure. It was kadosh because HaShem was standing on it (Exodus 3:5). The distinction is His presence, not the ground's virtue.