Isaiah 40:6

My Notes

What Does Isaiah 40:6 Mean?

A voice commands: cry. The prophet asks: what shall I cry? And the answer that comes is the most honest assessment of human existence in all of Scripture.

"The voice said, Cry" — the command comes from an unidentified voice — heavenly, authoritative, demanding proclamation. The prophet is being conscripted as a herald. The message he'll deliver isn't his own. He's a mouthpiece. The voice supplies both the command and the content.

"And he said, What shall I cry?" — the prophet's response is willingness paired with dependence. He doesn't refuse. He doesn't presume. He asks: what? Give me the words. I'll speak them, but they need to be Yours. This is the posture of every genuine prophet: ready to speak, dependent on the Speaker for the content.

"All flesh is grass" — the message is about mortality. All flesh — not some. Not the wicked. Not the old. All. Every human body, every human life, every human enterprise. Grass. The comparison is devastating in its ordinariness. Grass is the most common, most temporary, most forgettable plant. It's everywhere and it dies everywhere. That's you.

"And all the goodliness thereof is as the flower of the field" — it gets worse. The goodliness — the beauty, the attractiveness, the chesed (steadfast love or kindness) of humanity — is a wildflower. More beautiful than grass, but equally temporary. The finest thing about you — your beauty, your accomplishments, your kindness, your best qualities — wilts at the same speed as the rest.

The next verse explains why: "The grass withereth, the flower fadeth: because the spirit of the LORD bloweth upon it." God's breath is what dries the grass. Human transience isn't an accident. It's built into the system by the One who made it. But the passage doesn't end in despair. Verse 8 pivots: "The grass withereth, the flower fadeth: but the word of our God shall stand for ever." Everything human passes. Everything divine endures.

Reflection Questions

• 1.How does the comparison of all flesh to grass land with you — comforting, humbling, or unsettling?
• 2.What 'goodliness' in your life — beauty, talent, achievement — are you treating as permanent when it's actually a wildflower?
• 3.What are you building on: things made of grass (human effort, appearance, accomplishment) or the word that stands forever?
• 4.How does the contrast between fading flesh and enduring word reshape what you invest your time and energy in?

Devotional

You are grass. That's not an insult. It's a fact. Every human body, every human accomplishment, every human beauty is temporary. The person you see in the mirror is wilting. The career you're building is fading. The strength you're relying on has an expiration date. All flesh is grass, and the prettiest grass is still grass.

The flower is the cruelest comparison. The goodliness — your best qualities, your most attractive traits, the things people admire about you — are wildflowers. Gorgeous for a day. Gone by evening. The thing that makes people notice you is the thing that will wither first. Youth fades. Beauty fades. Even kindness, in its human form, is seasonal. The flower of the field doesn't last.

This should make you ask: what am I building on? If you're building on flesh — on your body, your talent, your productivity, your influence — you're building on grass. It's green today. It's hay tomorrow. Everything that is purely human has a half-life, and it's shorter than you think.

But the word of God stands forever. That's the pivot the passage makes, and it's the only solid ground in a universe of grass. Your body will fail, but God's promises won't. Your accomplishments will be forgotten, but His word will endure. Your beauty will fade, but His truth will last. Build on the thing that doesn't wither. Build on the word that stands when everything made of flesh has returned to dust.

Commentary

Trusted original commentary from respected historical Bible scholars and theologians.

Cross References

Related passages throughout Scripture