Psalm 51 — David's confession, line by line

Psalm 51 is King David’s confession after the prophet Nathan confronted him over his adultery with Bathsheba and the killing of her husband, Uriah, which David arranged to cover it up. It is the most complete prayer of repentance in the Bible, and it moves in a clear order: a plea for mercy grounded in God’s character, an honest naming of sin, a request to be cleansed, a request for a new heart, a promise to help others, and a recognition that what God wants is not a ritual but a broken and humble heart.

You can read it as history, but it was preserved to be prayed. For three thousand years believers have borrowed David’s words when their own ran out. If you are carrying something you need to confess, read this psalm slowly, aloud if you can, and make it yours. What follows takes it a few verses at a time.

The psalm begins after someone told David the truth

For about a year, David said nothing. He carried on as king while the sin sat unconfessed. Then Nathan told him a story about a rich man who stole a poor man’s only lamb, and David was furious at the injustice, until Nathan turned the story round.

Then Nathan said to David, “You are that man! — 2 Samuel 12:7

David’s response was immediate, and so was God’s.

Then David said to Nathan, “I have sinned against the LORD.” “The LORD has taken away your sin,” Nathan replied. — 2 Samuel 12:13

Psalm 51 is the longer prayer behind those few words.

He appeals to who God is, not to who he is

Have mercy on me, O God, according to Your loving devotion; according to Your great compassion, blot out my transgressions. Wash me clean of my iniquity and cleanse me from my sin. — Psalm 51:1-2

David offers no case for himself. He does not mention his years of faithfulness, his victories or his worship. His only ground is God’s loving devotion, the steadfast covenant love that runs through the Old Testament, and God’s great compassion. That is the only ground any of us has.

Notice the three words for wrongdoing: transgressions, iniquity, sin. Rebellion, crookedness, missing the mark. And three verbs for what he asks: blot out, wash, cleanse. He is not asking God to overlook the sin but to remove it.

He names it without excuse

For I know my transgressions, and my sin is always before me. Against You, You only, have I sinned and done what is evil in Your sight, so that You may be proved right when You speak and blameless when You judge. — Psalm 51:3-4

“Against You, You only” can puzzle readers. David had wronged Bathsheba, Uriah, his army and his nation. He is not denying that. He is saying that at root every sin is against God, because it breaks his law and scorns his goodness. And he agrees that any judgement God passes on him would be fair. This is what confession means: saying about your sin what God says about it.

He goes deeper than the act

Surely I was brought forth in iniquity; I was sinful when my mother conceived me. Surely You desire truth in the inmost being; You teach me wisdom in the inmost place. — Psalm 51:5-6

This is not an excuse, as if David were blaming his birth. It is the opposite. He realises that adultery and murder were not out of character; they came from something wrong at the root of him. God wants truth not only in behaviour but in the inmost being, and David asks God to teach him there.

He asks to be made clean

Purify me with hyssop, and I will be clean; wash me, and I will be whiter than snow. Let me hear joy and gladness; let the bones You have crushed rejoice. Hide Your face from my sins and blot out all my iniquities. — Psalm 51:7-9

Hyssop was the small plant used in the law of Moses to sprinkle blood or water in rites of cleansing, including for people declared unclean. David asks God to do for him what those rituals pointed to. For Christians, that cleansing has been done in Christ, whose blood cleanses from all sin.

He also asks to hear joy again. Guilt had crushed him; he wants to be restored, not simply acquitted.

He asks for a new heart

Create in me a clean heart, O God, and renew a right spirit within me. Cast me not away from Your presence; take not Your Holy Spirit from me. Restore to me the joy of Your salvation, and sustain me with a willing spirit. — Psalm 51:10-12

The word “create” is the one used in Genesis for God making the world from nothing. David knows he cannot fix his own heart. He needs God to make something new. His deepest fear is not punishment but losing God’s presence. He had seen what happened to King Saul before him, from whom the Spirit of the LORD departed.

He looks outward again

Then I will teach transgressors Your ways, and sinners will return to You. Deliver me from bloodguilt, O God, the God of my salvation, and my tongue will sing of Your righteousness. O Lord, open my lips, and my mouth will declare Your praise. — Psalm 51:13-15

Forgiven people become useful. David expects that his failure, forgiven, will help others find their way back to God. And he names the worst thing plainly: bloodguilt. Even praise, he admits, has to be given to him: “open my lips”.

He offers the one thing God wants

For You do not delight in sacrifice, or I would bring it; You take no pleasure in burnt offerings. The sacrifices of God are a broken spirit; a broken and a contrite heart, O God, You will not despise. — Psalm 51:16-17

This is the centre of the psalm. There was no offering in the law for deliberate adultery and murder. David has nothing to bring except himself, broken. And that, he says, God will not despise. You may come to God with nothing to offer. That is exactly how he receives people.

He ends with the whole people of God

In Your good pleasure, cause Zion to prosper; build up the walls of Jerusalem. Then You will delight in righteous sacrifices, in whole burnt offerings; then bulls will be offered on Your altar. — Psalm 51:18-19

The king’s sin had damaged the nation, and his prayer widens to include it. Once the heart is right, worship can be offered again. Private confession leads back into shared worship.

Where Christians differ

Christians read verse 5 differently. Catholic, Lutheran and Reformed traditions see it as a key text for original sin, the inherited guilt and corruption of fallen humanity. Orthodox Christians generally speak instead of inheriting mortality and a tendency to sin, rather than Adam’s guilt. Many interpreters also think verses 18 and 19 were added when the psalm came to be used by the whole nation, perhaps during the exile, while others read them as David’s own.

Verse 11 raises another question: can a believer lose the Holy Spirit? Some traditions teach that a true believer cannot finally fall away, and read David’s prayer in light of the Spirit’s special anointing on Israel’s kings. Others hold that a believer can fall away, and read the verse as a sober warning. Both agree that the right response is David’s: to ask God to keep us near.

Praying it yourself

Read the psalm through once more, as your own prayer. Where David speaks of his sin, name yours. Then take God at his word, as the guide on how to confess to God, plainly explains. And if you want to hear what forgiveness felt like from the other side, read David’s companion psalm, Psalm 32.