The verse
"It is he that sitteth upon the circle of the earth, and the inhabitants thereof are as grasshoppers; that stretcheth out the heavens as a curtain, and spreadeth them out as a tent to dwell in." — Isaiah 40:22
This verse is the single most-cited "proof" that the Bible teaches a globe. Many modern apologetics ministries claim that "Isaiah knew the earth was a ball, centuries before Greek astronomy." The claim does not survive a word study.
The two Hebrew words
Chug (חוּג) — a flat circle
Used four times in the Old Testament:
- Isaiah 40:22 — the circle of the earth
- Job 22:14 — Yahuah walks in the chug of heaven
- Proverbs 8:27 — he set a chug upon the face of the deep
- Job 26:10 — he hath compassed the waters with bounds (verb form, drawing a circle)
In every case, chug describes a 2D arc or boundary — a horizon line, a drawn circle, a flat disc on the face of waters. Not a 3D sphere.
The cognate verb chaqaq means to inscribe, to draw a line, to mark a boundary — operations on a flat surface.
Dur (דּוּר) — a ball or sphere
Used as a noun for an actual sphere in:
- Isaiah 22:18 — "He will surely violently turn and toss thee like a ball (dur) into a large country."
- Isaiah 29:3 — "I will camp against thee round about (dur)" — circling around like a sphere
Hebrew has the word for sphere. It is not the word Isaiah used in 40:22.
What Proverbs 8:27 settles
The clearest cross-reference is in Proverbs:
"When he prepared the heavens, I was there: when he set a chug upon the face of the deep." — Proverbs 8:27
A chug "upon the face of the deep" can only be a flat boundary drawn on top of water — not a sphere around water. The text describes Yahuah setting a circular boundary on the surface of the waters of the deep, consistent with Genesis 1:6–10 where the dry land is gathered together within a defined circular region surrounded by the great deep.
The historical reading
Hebrew lexicons confirm the meaning. Strong's H2329 defines chug as "a circle (as drawn)". Brown-Driver-Briggs gives "vault, horizon, circuit". HALOT confirms it is the noun derived from chaqaq, to inscribe or draw a circle.
The Septuagint (Greek translation, ~250 BC) renders Isaiah 40:22 as gyron (γῦρον) — a circle, a ring — not sphaira (σφαῖρα), the Greek word for sphere. The translators who knew both languages did not see a sphere in the Hebrew either.
What modern apologetics misses
The argument that "chug can mean sphere because circles are 2D projections of spheres" is a category error. The Hebrew word for ball exists and is used elsewhere by the same author. Choosing the flat-circle word when the ball word is available is itself a statement.
The reverse claim — that ancient Hebrews knew the earth was a sphere — has no internal biblical support. Every other passage on Earth's structure (firmament, pillars, four corners, ends of the earth) describes a flat plane under a dome.
The reading
Isaiah 40:22 says Yahuah sits upon the disc of the earth. The cosmology is consistent with Genesis 1, Job 38, Psalm 104, and Revelation 7. The verse does not contradict the rest of Scripture — it joins it.
The single test
Open Isaiah 22:18 in any Hebrew interlinear. The word for ball there is dur. Now open Isaiah 40:22 in the same interlinear. The word is chug. Different words. Same author. Same prophet.
That is the case in one sentence.