And then, at the height of everything — king, covenant, victories on every side — David does the thing that becomes the hinge of the rest of his life in the other direction. He stays home from a war he should have led, sees Bathsheba bathing from his rooftop, sends for her, and sleeps with her while her husband Uriah is away fighting David's own battles. When she conceives, David tries to cover it by bringing Uriah home to sleep with his wife — and Uriah, a foreign-born soldier more loyal to Israel's army than David is being to his own men, refuses out of solidarity with his comrades still in the field, sleeping at the palace door instead (2 Samuel 11:9–11). David's response to being outdone in integrity by the man he's wronging isn't repentance. It's murder by proxy — a letter to his general ordering Uriah placed where the fighting is fiercest and then abandoned (2 Samuel 11:14–17). It's worth naming plainly what this scene actually is, the way Ramose and Manganyi would press you to: a king with absolute power uses a woman's body first, and then discards a faithful man's life to cover it, and the text does not soften either fact into something more flattering.
Nathan confronts him with a story about a rich man who steals a poor man's only lamb, and David — furious, righteous, blind to himself — pronounces his own sentence before Nathan says four words that end it: "Thou art the man" (2 Samuel 12:7). What happens in David next is the whole reason his story survives as more than a cautionary tale about kings and power. He doesn't defend himself. He doesn't have Nathan killed for the insult, which any number of ancient kings certainly would have. He says simply, "I have sinned against the LORD" (2 Samuel 12:13), and Psalm 51 — which the text explicitly ties to this exact moment — is what real repentance sounds like from the inside: "against thee, thee only, have I sinned, and done this evil in thy sight... create in me a clean heart, O God" (Psalm 51:4, 10). Kierkegaard's whole account of the self standing alone before God, unable to hide behind excuse or audience, is written out here centuries early. David isn't forgiven because the sin was small. He's forgiven because he stopped defending it the moment he was named.
The consequences aren't erased by the repentance, though, and the text doesn't pretend otherwise. The child dies. And Nathan's word over him — "the sword shall never depart from thine house" (2 Samuel 12:10) — turns out to be exactly, painfully accurate for the rest of David's reign.