Depravity of Man
Scripture's verdict on the human condition is unsparing. From the third chapter of Genesis to the last words of the apostles, a single line of testimony runs: humanity, considered apart from divine grace, is bent toward evil at the level of imagination, will, and deed. The biblical writers do not isolate depravity to a class of egregious offenders. They place it inside every heart, name it as the inheritance of every generation, and trace it back to a single primeval lapse.
The Adamic Lapse
The narrative locates the fracture at a particular tree on a particular day. The woman "saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of its fruit, and ate; and she gave also to her husband with her, and he ate" (Ge 3:6). The sentence that follows is not isolated to Adam: "for dust you are, and to dust you will return" (Ge 3:19) becomes the inheritance of every body that descends from him.
Paul reads the Genesis account as the doorway through which sin and death entered the human race: "as through one man sin entered into the world, and death through sin; and so death passed to all men, for that all sinned" (Ro 5:12). The same logic appears in 1Co 15:21, "since by man [came] death." Paul's earlier letter assigns the order of culpability with care — "Adam was not beguiled, but the woman being beguiled has fallen into transgression" (1Ti 2:14) — but the universal effect is unaltered. Isaiah looks back across the same horizon and says simply, "Your first father sinned" (Is 43:27). The book of Sirach captures the inheritance in a single line: "From a woman sin originated, And because of her we all must die" (Sir 25:24).
Wickedness Saturating the Imagination
The earliest assessment of post-Edenic humanity is total. Yahweh inspects the antediluvian world and sees "that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually" (Ge 6:5). After the flood the verdict is unchanged: "the imagination of man's heart is evil from his youth" (Ge 8:21). The Babel narrative repeats the pattern — once the imagination unifies, "nothing will be withheld from them, which they purpose to do" (Ge 11:6) — and Moses warns Israel that he already knows "their imagination which they frame this day" (De 31:21).
The Psalter and Wisdom literature universalize what Genesis reports about a single generation. The fool's denial of God produces a corporate corruption: "They are corrupt, they have done disgusting works; There is none who does good ... They have all gone aside; they have together become filthy; There is none who does good, no, not one" (Ps 14:1-3). Ecclesiastes draws the same unbroken line: "the heart of the sons of man is full of evil, and madness is in their heart while they live" (Ec 9:3); "Surely there is not [a] righteous man on earth, who does good, and does not sin" (Ec 7:20). Job presses the question into a generative principle: "Who can bring a clean thing out of an unclean? Not one" (Job 14:4).
David's confession in the Miserere reaches further still — to conception itself: "Look, I was brought forth in iniquity; And in sin did my mother conceive me" (Ps 51:5).
The Deceitful Heart
The Wisdom and prophetic books concentrate on the heart as the seat of the disorder. Jeremiah's diagnosis is the most uncompromising in the canon: "The heart is deceitful above all things, and it is exceedingly corrupt: who can know it?" (Je 17:9). Ezekiel pictures elders worshiping idols in inner chambers convinced "Yahweh does not see us" (Eze 8:12), and the book of Proverbs warns of "A heart that devises wicked purposes" (Pr 6:18). Sirach repeatedly traces sin back to a hardened or doubled heart: "A hardened heart grows bad at its end" (Sir 3:26); "A hardened heart increases sorrows, And he who is profane adds iniquity to iniquity" (Sir 3:27); "Do not disobey the fear of the Lord, And do not come near thereto with a double heart" (Sir 1:28).
Jesus locates the source of every defilement here: "from inside, out of the heart of men, evil thoughts proceed, whoring, thefts, murders, adulteries" (Mr 7:21). The author of Hebrews warns the church not to harbor "an evil heart of unbelief, in falling away from the living God" (He 3:12). Peter speaks of those who possess "a heart exercised in greed; sons of cursing" (2Pe 2:14). Ecclesiastes anticipates them: "the heart of the sons of man is fully set in them to do evil" (Ec 8:11).
Sin as Inheritance Through the Generations
Depravity is not only individual; it descends as a corporate trait. Moses calls Israel "a perverse and crooked generation" (De 32:5). Proverbs describes "a generation who are pure in their own eyes, And [yet] are not washed from their filthiness" (Pr 30:12). Sirach summarizes the line of descent: "A disgusting offspring is the generation of sinners, And a godless sprout is in the dwellings of the wicked" (Sir 41:5). When Jesus addresses his contemporaries, the same idiom returns: "O faithless and perverse generation, how long shall I be with you⁺, and bear with you⁺?" (Lu 9:41). Genesis even quantifies the slow swell of corporate guilt — "the iniquity of the Amorite is not yet full" (Ge 15:16) — and Romans names the New Covenant counterpart: a humanity "filled with all unrighteousness, wickedness, greed, maliciousness; full of envy, murder, strife, deceit, malignity" (Ro 1:29).
The Carnal Mind at Enmity
Paul concentrates the whole biblical complaint into a single anatomy: the mind set on the flesh. "The mind of the flesh is enmity against God; for it is not subject to the law of God, neither indeed can it be" (Ro 8:7). The Gentiles, by his account, walk "in the vanity of their mind, being darkened in their understanding, alienated from the life of God, because of the ignorance that is in them, because of the hardening of their heart" (Eph 4:17-18). They are "enemies in your⁺ mind in your⁺ evil works" (Col 1:21); the unbelieving have "both their mind and their conscience ... defiled" (Ti 1:15); and at the source God himself "delivered them up to a disapproved mind" (Ro 1:28) because "knowing God, they did not glorify him as God or give thanks; but became vain in their reasonings, and their senseless heart was darkened" (Ro 1:21).
Jeremiah's question — "How long will your evil thoughts lodge inside you?" (Je 4:14) — runs across both testaments. Yahweh "knows the thoughts of man, That they are vanity" (Ps 94:11); evil devices are "disgusting to Yahweh" (Pr 15:26); "The thought of foolishness is sin" (Pr 24:9); a man "as he thinks in his soul, so he is" (Pr 23:7). What the prophets call brutishness — a humanity "together brutish and foolish" before idols (Je 10:8), "without knowledge" (Je 51:17) — Peter and Jude later identify in the libertine teachers as men who "rail in matters of which they are ignorant ... like the creatures without reason" (2Pe 2:12; Jud 1:10).
The Flesh and Its Desires
What the prophets call the heart, Paul calls the flesh. "I know that in me, that is, in my flesh, dwells no good thing: for to want is present with me, but to do that which is good [is] not" (Ro 7:18). "I see a different law in my members, warring against the law of my mind, and capturing me in the law of sin which is in my members" (Ro 7:23). "Those who are after the flesh mind the things of the flesh" (Ro 8:5); "those who are in the flesh can't please God" (Ro 8:8); "if you⁺ live after the flesh, you⁺ must die" (Ro 8:13). Galatians presses the antithesis to its sharpest form: "the flesh lusts against the Spirit, and the Spirit against the flesh; for these are contrary the one to the other" (Ga 5:17), and what the flesh sows it reaps as "corruption" (Ga 6:8).
The catalog of fleshly works in Galatians — "whoring, impurity, sexual depravity, idolatry, witchcraft, enmities, strife, jealousy, wraths, factions, divisions, parties, envyings, drunkenness, revelings, and things similar to these" (Ga 5:19-21) — is not a register of unusual offenses. It is what the flesh produces when left to itself. John condenses the same anatomy into three desires: "the desire of the flesh and the desire of the eyes and the vainglory of life" (1Jn 2:16). James traces the inward war outward: "You⁺ lust and don't have; so you⁺ kill. And you⁺ covet and cannot obtain; so you⁺ fight and war" (Jas 4:2). Sirach warns the same: "Do not fall into the hand of your desire; Or it will smother your strength over you" (Sir 6:2); "excessive desire destroys its owners" (Sir 6:4); "Do not go after your desires, And refrain yourself from your appetites" (Sir 18:30); "He who has pleasure in evil will be condemned" (Sir 19:5). Even when prevented from acting, the depraved heart awaits opportunity: "if, for lack of power, he is hindered from sinning, He will do evil when he finds opportunity" (Sir 19:28).
The Epistle to the Greeks (Diognetus) frames Christian existence as a precarious lodging within this same flesh — "They are in the flesh, but do not live after the flesh" (Gr 5:8) — and characterizes the flesh as an inward antagonist of the soul: "The flesh hates the soul, and without having been wronged wars against it, because the flesh is prevented from enjoying pleasures" (Gr 6:5). Sirach pairs the same diagnosis with mortality and limitation: man "[has] the inclination of flesh and blood" (Sir 17:31); "He being flesh nourishes wrath, Who will make atonement for his sins?" (Sir 28:5).
Walking the Crooked Path
The disorder works itself out into a way of life. The Wisdom literature speaks of those "who are crooked in their ways, and wayward in their paths" (Pr 2:15); "There is a way which seems right to a man; But its end are the ways of death" (Pr 14:12). "The way of the wicked is disgusting to Yahweh" (Pr 15:9); "the way of betrayers is hard" (Pr 13:15); "The way of a fool is right in his own eyes" (Pr 12:15). Sirach observes how comfortable the descent feels: "The way of sinners is made smooth without stones, And at its end is the pit of Hades" (Sir 21:10). Isaiah describes a society that has lost the road altogether: "The way of peace they don't know ... they have made crooked paths for themselves" (Is 59:8). Jeremiah names the source — "the stubbornness of [their own] evil heart" (Je 7:24) — and Deuteronomy anticipates the man who hears the curse and tells himself, "I will have peace, though I walk in the stubbornness of my heart" (De 29:19).
The New Testament inherits the figure intact. Pre-conversion existence is a walk "according to the age of this world, according to the prince of the powers of the air, of the spirit that now works in the sons of disobedience" (Eph 2:2); pagan life past is having "walked in sexual depravity, erotic desires, winebibbings, revelings, carousings, and horrible idolatries" (1Pe 4:3). False teachers "walk after the flesh in the desire of defilement" (2Pe 2:10) and mockers come "walking after their own desires" (2Pe 3:3; Jud 1:18). Paul weeps over those whose walk reveals them as "the enemies of the cross of Christ" (Php 3:18).
Sin as Garment
The biblical writers reach for clothing imagery to describe how sin envelops the depraved person. Pride "is as a chain about their neck; Violence covers them as a garment" (Ps 73:6). The cursing man "clothed himself also with cursing as with his garment, And it came into his inward parts like water, And like oil into his bones" (Ps 109:18). Zechariah sees the high priest "clothed with filthy garments" (Zec 3:3), and Jude warns Christians to hate "even the garment spotted by the flesh" (Jud 1:23). Peter exposes those who use "freedom for a cloak of wickedness" (1Pe 2:16). The point is the same throughout: sin is not a stain that scrubs off but a garment that has to be removed — and only by another's hand.
A Universal Verdict
Paul gathers all of these threads in Romans 3 and renders the global indictment: "all under sin ... There is none righteous, no, not one; There is none who understands, There is none who seeks after God; They have all turned aside, they have together become unprofitable; There is none who does good, no, not so much as one" (Ro 3:9-12), "for all have sinned, and fall short of the glory of God" (Ro 3:23). The Ephesian summary makes the personal application unmistakable: humanity was "dead through your⁺ trespasses and sins ... and were by nature children of wrath, even as the rest" (Eph 2:1-3). What Genesis began, Romans concludes — and what every heart, every generation, and every walk between the two confirms.