“He has blinded their eyes and hardened their heart, lest they see with their eyes, and understand with their heart, and turn, and I would heal them.”
English Standard Version (ESV)
It’s easy to read this as God preventing them from seeing, but the point is that their hardened hearts caused them to miss the healing God offered. This verse highlights how deeply ingrained resistance to God can actively thwart His desire to bring restoration and wholeness.
“He has blinded their eyes and hardened their heart, lest they see with their eyes, and understand with their heart, and turn, and I would heal them.”
English Standard Version (ESV)
Jesus has just spoken about how His message will divide people, and now John explains this rejection by quoting Isaiah. Despite Jesus performing numerous signs, many rejected Him, fulfilling prophecy that a hardened people would not believe or turn to God, and thus miss out on His healing. This prophecy describes a judicial hardening that prevents further understanding and turning, ultimately blocking the path to being healed by Jesus.
This verse sounds like God actively prevents people from turning to Him. But how does that square with a God who desires all to be saved?
This passage from Isaiah 6, quoted by John, describes a judicial hardening. It's not that God doesn't want people to turn to Him, but that in His justice, He allows their persistent rejection of truth to seal their fate.
The Prophet's Mission:
God sends Isaiah with a message, but forewarns him that the result will be people hearing but not understanding, and their hearts becoming unresponsive. This isn't God actively doing the blinding and hardening in a vacuum, but rather, His command to preach the truth will have a specific, hardened effect on those who have already rejected Him.
Justice and Rejection:
Think of it like a powerful light. For those with eyes to see, it reveals truth. But for someone who has deliberately shut their eyes, that same intense light can be painful and disorienting. God's word, meant to heal, becomes a judgment when met with stubborn rebellion. The consequence of their ongoing sin is that they are left in their blindness.
The verse clearly states the consequence of this blinding and hardening: 'lest they...turn, and I should heal them.' What does this reveal about the connection between understanding and healing?
This phrase reveals a crucial link: turning to God is the prerequisite for experiencing His healing.
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The Path to Healing:
God's desire is to heal, but healing requires a willingness to turn. The blindness and hardening are the obstacles that prevent this turning. When people refuse to 'see with their eyes' and 'understand with their heart,' they block the very path that leads to spiritual restoration.
A Cause-and-Effect Relationship:
The structure 'lest they...turn, and I should heal them' highlights a cause-and-effect. The hardening is the cause, preventing the effect of turning. And the consequence of not turning is the inability for Christ, the ultimate Healer, to bring His healing. It underscores that divine healing is offered to those who respond in faith and repentance.
Understand the original words
typhloō · Greek Verb
The process of God rendering someone unable to perceive spiritual truth as a judgment for persistent rebellion and rejection of His revelation. It involves a judicial withdrawal of spiritual capacity.
pōroō · Greek Verb
A state of moral and spiritual insensitivity or obstinacy where a person resists God’s influence. It represents a persistent rebellion that leads to a settled condition of unbelief.
kardia · Greek Noun
The central seat of human reason, will, and affection. Biblically, it is the control center of the person, determining one’s moral choices and spiritual orientation.
epistrephō · Greek Verb
To repent or change direction, specifically to turn away from sin and toward God. It signifies a radical transformation of life and alignment with God’s will.
iaomai · Greek Verb
God’s act of restoration, deliverance, and forgiveness. It signifies the removal of spiritual brokenness caused by sin and the reconciliation of a person to God.
This verse directly quotes Isaiah 6:9-10, a prophecy given during a time of significant national spiritual decline. John uses it to explain why, despite Jesus' clear miracles and teachings, many rejected Him. The prophecy speaks to a pattern of divine judgment where, for those who persistently refuse God's truth, their spiritual faculties become dulled, preventing them from seeing, understanding, and ultimately turning to God for healing.
c. 740 BC
Isaiah's Prophetic Call
The prophet Isaiah receives his commission from God, including the somber message that his ministry will largely result in spiritual hardening for the people. This is the origin of the prophecy quoted by John.
586 BC
Destruction of Jerusalem and Temple
The Babylonians conquer Judah, destroy Jerusalem and the First Temple, and exile many of the people. This marks a profound national crisis and a time of judgment for Israel's disobedience.
c. 500 BC - 400 BC
Ezra and Nehemiah Rebuild Community
Following the return from exile, Ezra and Nehemiah lead efforts to restore Jewish religious and civic life in Jerusalem. Despite reforms, spiritual apathy and resistance to God's ways persist among many.
c. 4 BC - AD 30/33— this verse
Jesus' Ministry in Galilee and Judea
Jesus proclaims the kingdom of God, performs numerous miracles, and teaches with divine authority. Despite clear signs of His identity and power, many Jewish leaders and people reject Him.
c. AD 30
Jesus' Triumphal Entry into Jerusalem
Jesus rides into Jerusalem, hailed by many as a king. However, the religious elite largely reject Him, and the crowds soon turn, illustrating the rejection Isaiah prophesied.
c. AD 33
Crucifixion and Resurrection of Jesus
Jesus is crucified and then resurrected, the ultimate act of atonement and demonstration of God's power. Yet, this pivotal event is rejected by many religious leaders, fulfilling the prophecy of disbelief.
c. AD 60-62
Paul's Ministry and Writings
The Apostle Paul, referencing Isaiah's prophecy in Acts 28, explains the widespread rejection of the Gospel among the Jews by pointing to a judicial hardening. This demonstrates the ongoing relevance of Isaiah's message.
This is the foundational Old Testament passage that John is quoting, describing God's commission to Isaiah to preach a message that would ultimately lead to the hardening of the people's hearts.
Matthew 13:14-15Jesus himself quotes this passage from Isaiah to explain why He speaks in parables, highlighting that some hearts are already so hardened that they cannot receive His message and be healed.
Acts 28:25-27Paul quotes this same passage from Isaiah when addressing the Jews in Rome, showing the consistent pattern of rejection and spiritual blindness faced by the Gospel message.
Romans 11:7-8Paul directly references Isaiah's prophecy to explain why Israel, as a nation, did not attain what it was seeking (righteousness through the Law), linking it to a spiritual blindness God allowed.
vincentJohn 12:40: "He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them."
He hath blinded, etc.These words of Isaiah are repeated five times in the New Testament as the description of the Jewish people in its latest stage of decay. Matthew 13:13; Mark 4:12; Luke 8:10; John 12:40; Acts 28:26.Hardened (πεπώρωκεν)See on the kindred noun πώρωσις, hardness, Mark 3:5.Understand (νόησωσιν)…
calvinJohn 12:37-41: "But though he had done so many miracles before them, yet they believed not on him:"
- And though he had done so many signs in their presence, they believed not in him: 38. That the saying of Isaiah the prophet might be fulfilled, which he spoke, Lord, who hath believed our report? [28] and to whom hath the arm of the Lord been revealed? 39. Therefore they could not believe, because Isaiah saith again, 40. He hath blinded their eyes, and hardened their heart, lest they should s…
It’s easy to read this as God preventing them from seeing, but the point is that their hardened hearts caused them to miss the healing God offered. This verse highlights how deeply ingrained resistance to God can actively thwart His desire to bring restoration and wholeness.
Jesus has just spoken about how His message will divide people, and now John explains this rejection by quoting Isaiah. Despite Jesus performing numerous signs, many rejected Him, fulfilling prophecy that a hardened people would not believe or turn to God, and thus miss out on His healing. This prophecy describes a judicial hardening that prevents further understanding and turning, ultimately blocking the path to being healed by Jesus.
Jesus has just spoken about how His message will divide people, and now John explains this rejection by quoting Isaiah. Despite Jesus performing numerous signs, many rejected Him, fulfilling prophecy that a hardened people would not believe or turn to God, and thus miss out on His healing. This prophecy describes a judicial hardening that prevents further understanding and turning, ultimately blocking the path to being healed by Jesus.
"“He has blinded their eyes and hardened their heart, lest they see with their eyes, and understand with their heart, and turn, and I would heal them.”" — It’s easy to read this as God preventing them from seeing, but the point is that their hardened hearts caused them to miss the healing God offered. This verse highlights how deeply ingrained resi…
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Last reviewed October 2026