“The heart is deceitful above all things, and desperately wicked: who can know it?”
My Notes
What Does Jeremiah 17:9 Mean?
Jeremiah delivers the most penetrating diagnosis of the human condition in the Old Testament: the heart is deceitful above all things, and desperately wicked. Who can know it?
The heart (leb) is the center of thought, will, and decision-making in Hebrew anthropology. The diagnosis is not about feelings. It is about the core operating system of a human being.
"Deceitful above all things" — the heart is the supreme deceiver. Not just deceitful — above all things deceitful. More deceptive than anything else in existence. The heart deceives its own owner.
"Desperately wicked" — the Hebrew (anash) means incurable, beyond remedy by human means. The sickness is terminal without divine intervention. The wickedness is not a surface condition. It is a deep, incurable disease.
"Who can know it?" — the question admits impossibility. You cannot fully know your own heart. It deceives you too well. Only God can penetrate the deception — which is exactly what the next verse (v.10) declares: I the LORD search the heart.
Reflection Questions
- 1.How does the heart being 'deceitful above all things' challenge your trust in your own self-assessment?
- 2.What does 'desperately wicked' mean for human ability to fix the heart through self-effort?
- 3.Why is 'who can know it' both a question and an admission of impossibility?
- 4.How does God searching the heart (v.10) provide hope after this devastating diagnosis?
Devotional
The heart is deceitful above all things. Above all things. More deceitful than the most skilled liar. More deceptive than the most convincing con artist. And the person it deceives most thoroughly is you.
Desperately wicked. Not mildly troubled. Desperately — incurably, terminally, beyond human remedy. The wickedness of the heart is not a condition you can treat with self-improvement. It requires surgery only God can perform.
Who can know it? The question is rhetorical — and the answer is devastating. You cannot. Your own heart deceives you so thoroughly that you cannot see it clearly. The person you think you are is a construction your deceitful heart has built. The real condition is hidden even from you.
This is the most uncomfortable verse in Jeremiah — and possibly in the entire Old Testament. It says your heart is the problem. Not your circumstances. Not other people. Your heart. And the heart is so skilled at deception that you do not even know how bad it is.
The hope is in the next verse: I the LORD search the heart, I try the reins. God can see what you cannot. The heart that deceives you is transparent to him. The wickedness that is incurable by human means is known — and addressable — by God.
The diagnosis is terrifying. The doctor is trustworthy. And the God who reveals the disease is the same God who offers the cure (Ezekiel 36:26 — a new heart will I give you). The desperately wicked heart is not the end of the story. It is the diagnosis that makes the new heart necessary.
Commentary
Trusted original commentary from respected historical Bible scholars and theologians.
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Cross References
Related passages throughout Scripture