Verse explainer

What does Isaiah 6:3 really mean?

The triple 'Holy' isn't mere repetition — in Hebrew it's the highest possible superlative, and it's the seraphim's spontaneous cry, not a formula.

KJV

And one cried unto another, and said, Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory.

BSB

And they were calling out to one another: "Holy, holy, holy is the LORD of Hosts; all the earth is full of His glory."

The plain meaning

Isaiah is in the temple when he sees the Lord enthroned, surrounded by seraphim. These creatures, overwhelmed by what they see, call out to one another — not to Isaiah, not to us — in a kind of antiphonal awe. The Hebrew word 'holy' (qadosh) means set apart, utterly other, unlike anything in creation. Saying it once is a statement. Saying it twice is emphasis. Saying it three times is the Hebrew way of expressing the absolute maximum — 'holy beyond all measure.' The second half of their cry answers the first: this God who is infinitely set apart is not hidden in a distant corner. The whole earth — everything, everywhere — is saturated with his glory. The vision isn't abstract theology; it drives Isaiah to his knees in self-awareness (v. 5), and then sends him out with a message (v. 8). The Trisagion, as it came to be called, later echoes in Revelation 4:8, where four living creatures repeat it day and night.

The common misreading

'Holy, holy, holy' is just a liturgical chant — poetic filler repeated for rhythm. People who encounter this verse in hymns or liturgy sometimes absorb the repetition as musical texture rather than semantic weight. But Hebrew doesn't use superlatives the way Greek or English do. You can't say 'most holy' or 'holiest' in the same way; instead, repetition carries the intensifying load. Once is an assertion. Twice is strong emphasis — as in 'Truly, truly I say to you.' Three times is reserved for the absolute maximum the language can reach. The only other triple like it in the Hebrew Bible is Jeremiah 7:4 ('the temple of the LORD'), and there Jeremiah is quoting people who have turned a true thing into a thoughtless slogan — the opposite of what the seraphim are doing. Here the repetition is deliberate, awestruck, and theologically precise: this God is holy in a way that exhausts the word. The second line confirms it isn't mere decoration: the same God whose holiness makes Isaiah collapse (v. 5) is the one whose glory fills every corner of the earth — glory and holiness are not opposites but two facets of the same overwhelming reality.

What the commentators say

John Gillearly 18th c. · PD

Gill reads the seraphim calling to one another as a picture of harmony and unified proclamation — they agree in what they declare. He sees the triple 'Holy' as affirming one God in three Persons, with the holiness of Father, Son, and Spirit each displayed distinctly across the doctrines of grace. The earth's fullness being his glory points forward, he argues, to the day when knowledge of the Lord will fill the earth from sea to sea.

Jamieson, Fausset & Brown19th c. · PD

JFB note that the triple holiness implies the Trinity and identify God's holiness as the keynote of Isaiah's entire prophetic ministry. On 'the whole earth,' they follow the Hebrew more precisely: the earth's fullness — everything it contains — is his glory. They cross-reference Psalm 24:1 and 72:19, grounding the declaration not in a future hope alone but in the present reality of his sovereign ownership.

The word behind it

קָדוֹשׁ qadosh

'Holy.' From a root meaning cut off or set apart. Applied to God, it describes not merely moral purity but utter otherness — a category of being unlike anything creaturely. The tripling (qadosh, qadosh, qadosh) is the Hebrew superlative of superlatives; there is no stronger way to say the word. Gesenius notes the adjective's core idea is separation from what is common or unclean. Isaiah's own cry in v. 5 — 'I am undone' — is the human reaction to encountering this quality face to face.

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