Psalms 51:5

“Behold, I was shapen in iniquity, etc.] This cannot be understood of any personal iniquity of his immediate parents; since this respects his wonderful formation in the womb, in which both he and they were wholly passive, as the word here used is of that form; and is the amazing work of God himself, so much admired by the psalmist, (<19D913>Psalm 139:13-16); and cannot design any sinfulness then infused into him by his Maker, seeing God cannot be the author of sin; but of original sin and corruption, derived to him by natural generation: and the sense is, that as soon as ever the mass of human nature was shaped and quickened, or as soon as soul and body were united together, sin was in him,…”

“His guilt was aggravated by his essential, native sinfulness, which is as contrary to God's requisitions of inward purity as are outward sins to those for right conduct.”

“Behold, I was shapen in iniquity - The object of this important verse is to express the deep sense which David had of his depravity. That sense was derived from the fact that this was not a sudden thought, or a mere outward act, or an offence committed under the influence of strong temptation, but that it was the result of an entire corruption of his nature - of a deep depravity of heart, running back to the very commencement of his being. The idea is, that he could not have committed this offence unless he had been thoroughly corrupt, and always corrupt. The sin was as heinous and aggravated “as if” in his very conception and birth there had been nothing but depravity. He looked at his,…”

“Behold - Nor is this the only sin which I have reason to bewail before thee; for this filthy stream leads me to a corrupt fountain: and upon a review of my heart, I find, that this heinous crime, was the proper fruit of my vile nature, which, ever was, and still is ready to commit ten thousand sins, as occasion offers. Psalms 51:6”

“51:5 I was born a sinner: The psalmist is not making excuses but is acknowledging the depth of his sinfulness. From the time we are conceived, we all share in the human condition of sinfulness.”

“shapen: Psa 58:3; Gen 5:3, Gen 8:21; Job 14:4, Job 15:14-16; Joh 3:6; Rom 5:12; Eph 2:3 conceive: Heb. warm Psalms 51:6”

“David here confesses his hereditary sin as the root of his actual sin. The declaration moves backwards from his birth to conception, it consequently penetrates even to the most remote point of life's beginning. חוללתּי stands instead of נולדתּי, perhaps (although elsewhere, i.e., in Psa 90:2, the idea of painfulness is kept entirely in the background) with reference to the decree, "with pain shalt thou bring forth children," Gen 3:16 (Kurtz); instead of הרתה אתי, with still more definite reference to that which precedes conception, the expression is יחמתני (for יחמתני, following the same interchange of vowel as in Gen 30:39; Jdg 5:28). The choice of the verb decides the question whether by…”