Isaiah 44:20 says the idolater's heart is deluded so he cannot see the lie — directly explaining the blindness in verse 18.

Isaiah 44:9 says idol makers cannot see or know — the same spiritual blindness condemned in verse 18.

Isaiah 45:20 mocks those who carry wooden idols and pray to a powerless god — they have no knowledge, echoing the blindness here.

Isaiah 6:10 records the command to shut eyes and hearts—the same divine hardening that prevents understanding.

In Isaiah 29:10, God pours out a spirit of deep sleep, closing eyes—the same divine blinding as here.

Isaiah 6:9 directly parallels the theme: God's judgment causes people to see but not perceive, hear but not understand.

Isaiah 43:8 summons the blind who have eyes and deaf who have ears — the same spiritual condition God addresses.

Isaiah 46:7 describes the idol's inability to move or save — not directly about blindness but reinforces the folly of trusting lifeless objects.

Isaiah 1:3 contrasts animals who know their master with Israel who does not — a broader failure to understand God.

Isaiah 27:11 describes a people lacking understanding who face judgment — echoing the same root cause from a covenant perspective.

In Romans 11:8-10, Paul directly quotes this divine blinding, applying Isaiah's language to Israel's hardening.

In 2 Thessalonians 2:9-12, God sends strong delusion on those rejecting truth, mirroring the active blinding in Isaiah.

Romans 1:21-23 describes darkened hearts from rejecting God—the same divine blinding of understanding seen here.

Matthew 13:14 directly quotes Isaiah's prophecy of blind unseeing—the same divine hardening here is fulfilled in Jesus' audience.

Matthew 13:15 continues the Isaiah 6:10 quote—the same blinded eyes and hardened hearts.

Romans 1:21-23 describes darkened hearts from rejecting God—the same divine blinding of understanding seen here.

John 12:40 quotes Isaiah 6:10, using the exact language of blinded eyes and hardened hearts — identical condition to Isaiah 44:18.

In John 8:43, Jesus says the people cannot understand because they are unable to hear — a direct parallel to the inability to understand in Isaiah 44:18.

In Jeremiah 10:14, every idol maker is 'brutish'—the same divine judgment of darkened understanding as here.

In Jeremiah 10:8, idolaters are 'brutish and foolish'—the same divine blinding that makes them senseless toward idols.

In Jeremiah 5:21, the same language of eyes that see not and ears that hear not is used against foolish Israel, echoing Isaiah.

In 2 Corinthians 4:4, Satan blinds minds of unbelievers, paralleling God's blinding in Isaiah but with a different agent.

Jeremiah 51:17 exposes the brutish ignorance of idol makers, mirroring the blindness described here.

In Romans 11:7, Paul directly states 'the rest were blinded,' mirroring the divinely shut eyes of this verse.

In Matthew 13:13, Jesus describes people seeing but not perceiving, hearing but not understanding — the same spiritual blindness as Isaiah 44:18's shut eyes and hardened hearts.

In 2 Corinthians 3:14, their minds were blinded—a clear parallel to the inability to see and understand here.

Psalm 135:18 reinforces that idol makers become like their blind, senseless idols — the same fate of spiritual deadness.

In Mark 4:12, Jesus says they see but not perceive, hear but not understand — directly mirroring Isaiah 44:18's shut eyes and uncomprehending hearts.

In Mark 8:18, Jesus asks 'Having eyes, see ye not?' — directly matching Isaiah 44:18's description of eyes that cannot see.

In Luke 8:10, Jesus says some 'seeing might not see, hearing might not understand' — the same condition as Isaiah 44:18's shut eyes and hardened hearts.

In Ephesians 4:18, darkened understanding and blindness of heart directly correspond to the shut eyes and hearts here.

In Luke 19:42, peace is 'hid from thine eyes' — directly parallel to Isaiah 44:18's eyes that are shut and cannot see.

In John 9:39, Jesus echoes this theme of divinely caused blindness, showing spiritual sight and judgment.

Hosea 4:12 shows idolatry causing God's people to err—a related spiritual blindness from consulting wooden idols.

Judges 18:24 shows Micah grieving over stolen handmade gods — illustrating the foolish idolatry that Isaiah 44:18 says blinds people.

In Luke 11:34, the eye is the lamp of the body — an 'evil' eye brings darkness, paralleling Isaiah 44:18's shut eyes that cannot see.

In Mark 3:5, 'hardness of their hearts' parallels Isaiah 44:18's hearts that cannot understand — both describe a condition blocking spiritual perception.

Matthew 6:23 warns that an evil eye fills the body with darkness — a NT parallel to spiritual blindness and darkness.

In Daniel 12:10, the wicked do not understand, a theme of spiritual blindness similar to Isaiah in an eschatological context.

In Proverbs 28:5, evil men lack understanding, similar to the idolaters in Isaiah who cannot discern.

Psalm 106:7 recounts Israel's failure to understand God's wonders — a historical example of the spiritual dullness described in Isaiah 44:18.

Psalm 40:4 blesses those who trust God instead of false gods — the opposite of the blind idolaters in Isaiah 44:18.

Psalm 81:12 shows God giving them over to their own stubborn hearts—a related divine judgment but less specific about blindness.