Because I knew that thou art obstinate, and thy neck is an iron sinew, and thy brow brass;

ISAIAH 48:4KJV
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Isaiah 48:4 (KJV)

What does Isaiah 48:4 mean?

Isaiah 48:4 describes how God knows the people of Israel are stubborn, using strong images to show their unwillingness to change: their neck is like iron and their forehead like bronze. The verse highlights Israel’s resistance to correction and their hard-heartedness toward God’s guidance.

In this part of Isaiah, God is speaking through the prophet to the people of Israel, addressing their long history of ignoring His warnings and refusing to listen. The verse uses vivid language to show just how set in their ways the people have become, making it clear that their stubbornness is not a new problem but something God has always known about.

The Hebrew behind Isaiah 48:4

  • “Obstinate” is from קָשֶׁה (qāšeh), which means “hard” or “stubborn.” This word paints a picture of people who are difficult to persuade or lead, emphasizing their resistance.
  • “Neck” is עֹרֶף (ʿōref), often used in the Bible to describe someone who refuses to bow or submit, showing pride or defiance.
  • “Iron” is בַּרְזֶל (barzel), and “sinew” is גִּיד (gid). Together, “iron sinew” suggests a neck that cannot be bent, showing extreme stubbornness.
  • “Brow” is מֵצַח (mētsaḥ), and “brass” is נְחוּשָׁה (neḥushah). A “brow of brass” means a forehead that cannot be shamed or softened, highlighting a refusal to feel guilt or change one’s mind.

Why Isaiah 48:4 matters

  • The verse clears up any idea that Israel’s disobedience was a surprise to God; He has always known their character.
  • The strong images of “iron sinew” and “brow brass” emphasize just how deep-rooted Israel’s stubbornness was, helping readers understand the seriousness of their resistance.
  • This verse connects to the larger message in Isaiah 48, where God explains why He acts as He does with Israel—He is patient, but He also knows their hearts and addresses their persistent hardness.

Where else these words appear

“sinew” Hebrew H1517 · used in 6 verses

  • Genesis 32:32 Therefore the children of Israel eat not of the sinew which shrank, which is upon the hollow of the thigh, unto this day: because he touched the hollow of Jacob's thigh in the sinew that shrank.
  • Job 10:11 Thou hast clothed me with skin and flesh, and hast fenced me with bones and sinews.
  • Ezekiel 37:6 And I will lay sinews upon you, and will bring up flesh upon you, and cover you with skin, and put breath in you, and ye shall live; and ye shall know that I am the LORD.

“brow” Hebrew H4696 · used in 10 verses

  • Exodus 28:38 And it shall be upon Aaron's forehead, that Aaron may bear the iniquity of the holy things, which the children of Israel shall hallow in all their holy gifts; and it shall be always upon his forehead, that they may be accepted before the LORD.
  • 2 Chronicles 26:20 And Azariah the chief priest, and all the priests, looked upon him, and, behold, he was leprous in his forehead, and they thrust him out from thence; yea, himself hasted also to go out, because the LORD had smitten him.
  • Ezekiel 3:8 Behold, I have made thy face strong against their faces, and thy forehead strong against their foreheads.

“brass” Hebrew H5154 · used in 10 verses

  • Leviticus 26:19 And I will break the pride of your power; and I will make your heaven as iron, and your earth as brass:
  • Job 28:2 Iron is taken out of the earth, and brass is molten out of the stone.
  • Psalms 18:34 He teacheth my hands to war, so that a bow of steel is broken by mine arms.

“neck” Hebrew H6203 · used in 32 verses

  • Genesis 49:8 Judah, thou art he whom thy brethren shall praise: thy hand shall be in the neck of thine enemies; thy father's children shall bow down before thee.
  • Deuteronomy 31:27 For I know thy rebellion, and thy stiff neck: behold, while I am yet alive with you this day, ye have been rebellious against the LORD; and how much more after my death?
  • Nehemiah 9:29 And testifiedst against them, that thou mightest bring them again unto thy law: yet they dealt proudly, and hearkened not unto thy commandments, but sinned against thy judgments,(which if a man do, he shall live in them;) and withdrew the shoulder, and hardened their neck, and would not hear.