Understanding Isaiah 44:18-20: Feeding on Ashes

Historical Setting and the Folly of Idolatry

These words from Isaiah 44 were spoken to God’s people during their low point - trapped in Babylon, far from home, wondering if their God had lost power.

The prophet, often called Second Isaiah (chapters 40 - 48), speaks to Jews in exile, reminding them that the idols worshipped by Babylon were nothing but man-made objects, while their God is the living Creator who calls them back to hope. These people had begun to doubt, maybe even copy the practices around them - bowing to statues carved from wood, not realizing the absurdity. The passage isn’t just about foreigners. It warns God’s own people not to lose their sense of reality by chasing lifeless things.

This blindness - eyes closed, hearts hardened - is not just ignorance. It is spiritual confusion so deep that a person can use half a log to cook dinner and then kneel to worship the leftover piece, never questioning the madness, as Paul later says in Romans 1:21, 'For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.'

The Madness of Idolatry and the Delusion of the Human Heart

This passage isn’t primarily predicting a future event but is a powerful preaching moment, confronting the people with the absurdity of idolatry while revealing the deeper spiritual blindness that leads them to trust in what their own hands have made.

The prophet uses sharp irony: a man burns half a log to cook his food, then takes the other half and bows down to it as a god - calling on a piece of wood to save him, unaware of how senseless it is. This isn’t just about ancient Babylonians. It concerns any heart that turns from the living God to something lesser, mistaking a creation for the Creator. The rhetorical questions - 'Shall I make the rest of it an abomination? Shall I fall down before a block of wood?' - are meant to shock the listener into self-awareness, exposing how far reason has fallen. Paul later describes in Romans 1:25 that people 'exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator,' and the idol-maker is trapped in a lie he helped build.

The phrase 'he feeds on ashes' is a vivid metaphor - ashes being useless, empty, and gone. It pictures a life built on illusion, where no matter how hard you work or how sincere you are, you end up with nothing. This delusion isn’t accidental. It is the result of a heart so hardened that it can’t question its own actions or say, 'This is a lie.' The passage implies that God allows this blindness as a consequence of turning away, as shown in 2 Corinthians 4:6, where Paul contrasts this darkness with God’s light: 'For God, who said, “Let light shine out of darkness,” has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.'

So this prophecy is both a warning and a call to wake up: the idols we craft - whether literal statues or modern substitutes like success, control, or comfort - cannot save us. They are lies in our right hand, and we are feeding on ashes.

He feeds on ashes; a deluded heart has led him astray, and he cannot deliver himself or say, 'Is there not a lie in my right hand?'

Yet Isaiah doesn’t leave us there. The very fact that God speaks this truth means there is still a way back - to the one who formed Jacob and calls Israel by name, as the next verses will remind us.

Seeing the True God in Jesus

The blindness Isaiah describes - the inability to see the lie in our own hands - finds its answer in the one who opens blind eyes and gives new sight.

Paul writes in 2 Corinthians 4:6, 'For God, who said, “Let light shine out of darkness,” has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ,' and we see that Jesus is the living image of the invisible God, the one who breaks through our delusion. Where idols leave us feeding on ashes, Jesus offers living bread and calls us to worship the Father in spirit and truth.

For God, who said, 'Let light shine out of darkness,' has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.

So this passage doesn’t end in darkness - it points forward to the one who is the light of the world, the true God who cannot be carved by human hands but who came to us in flesh, full of grace and truth.

The Whole Bible Story: From Idols to the True Image

This passage isn’t merely a rebuke from Isaiah’s time. It is part of a much larger story the Bible tells from beginning to end.

Back in Exodus 20:3-5, God said, 'You shall have no other gods before me. You shall not make for yourself a carved image… for I the Lord your God am a jealous God.' That command wasn’t merely about rules. It was about protecting our hearts from the emptiness of idols. Centuries later, Jeremiah 10:1-16 echoed Isaiah’s mockery, showing how foolish it is to craft a god from wood and silver, when the true God 'shakes the earth' and 'makes the world by his wisdom.'

The New Testament picks up this thread with urgency. In Romans 1:21-23, Paul describes how people 'became futile in their thinking' and 'exchanged the glory of the immortal God for images,' similar to the man in Isaiah who worships a block of wood. Then 1 John 5:21 warns, 'Little children, keep yourselves from idols,' showing that even in Jesus’ day, the temptation to replace God with something smaller was still real. But the good news is that God didn’t leave us blind. He sent Jesus, the true image of the invisible God, to open our eyes.

He feeds on ashes; a deluded heart has led him astray, and he cannot deliver himself or say, 'Is there not a lie in my right hand?'

So while Jesus has already broken the power of idolatry through His life, death, and resurrection, we still live in a world where people worship lies - money, power, self. Yet Isaiah’s words still give us hope: one day, every false god will vanish, and every knee will bow to Christ. Until then, we wait, not in despair, but in confidence that the God who called light from darkness will finally heal every deluded heart and fill the new creation with His truth.

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