The look on their faces bears witness against them; they proclaim their sin like Sodom, they do not hide it. Woe to them! For they have brought evil on themselves. Tell the innocent how fortunate they are, for they shall eat the fruit of their labors. Woe to the guilty! How unfortunate they are, for what their hands have done shall be done to them. My people—children are their oppressors, and women rule over them. O my people, your leaders mislead you, and confuse the course of your paths. (NRSV 3:9-12)
The look on their countenance witnesses against them, And they declare their sin as Sodom; They do not hide it. Woe to their soul! For they have brought evil upon themselves. Say to the righteous that it shall be well with them, For they shall eat the fruit of their doings. Woe to the wicked! It shall be ill with him, For the reward of his hands shall be given him. As for My people, children are their oppressors, And women rule over them. O My people! Those who lead you cause you to err, And destroy the way of your paths. (KJV 3:9-12)
Sin exposes itself; people can't hide it. Their own expressions testify against them.
And I said: "Woe is me! I am lost, for I am a man of unclean lips, and I live among a people of unclean lips; yet my eyes have seen the King, the Lord of hosts!" Then one of the seraphs flew to me, holding a live coal that had been taken from the altar with a pair of tongs. The seraph touched my mouth with it and said: "Now that this has touched your lips, your guilt has departed and your sin is blotted out." (NRSV 6:5-7)
Then said I, Woe is me! for I am undone; because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for mine eyes have seen the King, the Lord of hosts. Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar: And he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged. (KJV 6:5-7)
Isaiah's "unclean lips" are purified with a burning coal, so he can speak with the voice of God. This is a great example of how "pain is medicine for the soul."
In that day the Lord God of hosts called to weeping and mourning, to baldness and putting on sackcloth; but instead there was joy and festivity, killing oxen and slaughtering sheep, eating meat and drinking wine. "Let us eat and drink, for tomorrow we die." The Lord of hosts has revealed himself in my ears: Surely this iniquity will not be forgiven you until you die, says the Lord God of hosts. (NRSV 22:12-14)
And in that day did the Lord God of hosts call to weeping, and to mourning, and to baldness, and to girding with sackcloth: And behold joy and gladness, slaying oxen, and killing sheep, eating flesh, and drinking wine: let us eat and drink; for tomorrow we shall die. And it was revealed in mine ears by the Lord of hosts, Surely this iniquity shall not be purged from you till ye die, saith the Lord God of hosts. (KJV 22:12-14)
Instead of being penitent and atoning from their sins by removing frivolous enjoyments from their lives and putting their attention on God, people continue with their out-of-control, seventy-keg-powered revelry.
Listen! the valiant cry in the streets; the envoys of peace weep bitterly. The highways are deserted, travelers have quit the road. The treaty is broken, its oaths are despised, its obligation is disregarded. The land mourns and languishes; Lebanon is confounded and withers away; Sharon is like a desert; and Bashan and Carmel shake off their leaves. (NRSV 33:7-9)
Behold, their valiant ones shall cry without: the ambassadors of peace shall weep bitterly. The highways lie waste, the wayfaring man ceaseth: he hath broken the covenant, he hath despised the cities, he regardeth no man. The earth mourneth and languisheth: Lebanon is ashamed and hewn down: Sharon is like a wilderness; and Bashan and Carmel shake off their fruits. (KJV 33:7-9)
This is one of the effects of sin. Instead of making things bloom and flourish, it dries them out. It's wasteful, expensive—and at the same time, all too cheap.
Who among you fears the Lord and obeys the voice of his servant, who walks in darkness and has no light, yet trusts in the name of the Lord and relies upon his God? But all of you are kindlers of fire, lighters of firebrands. Walk in the flame of your fire, and among the brands that you have kindled! This is what you shall have from my hand: you shall lie down in torment. (NRSV 50:10-11)
Who is among you that feareth the Lord, that obeyeth the voice of his servant, that walketh in darkness, and hath no light? let him trust in the name of the Lord, and stay upon his God. Behold, all ye that kindle a fire, that compass yourselves about with sparks: walk in the light of your fire, and in the sparks that ye have kindled. This shall ye have of mine hand; ye shall lie down in sorrow. (KJV 50:10-11)
Sin is like a fire that burns the person who kindles it. In a way, it's a metaphor for how passions and desires get out-of-control, the same way uncontrolled fire that isn't carefully tended can get out-of-control too.
Whom are you mocking? Against whom do you open your mouth wide and stick out your tongue? Are you not children of transgression, the offspring of deceit—you that burn with lust among the oaks, under every green tree; you that slaughter your children in the valleys, under the clefts of the rocks? Among the smooth stones of the valley is your portion; they, they, are your lot; to them you have poured out a drink offering, you have brought a grain offering. Shall I be appeased for these things? (NRSV 57:4-6)
Against whom do ye sport yourselves? against whom make ye a wide mouth, and draw out the tongue? are ye not children of transgression, a seed of falsehood. Enflaming yourselves with idols under every green tree, slaying the children in the valleys under the clifts of the rocks? Among the smooth stones of the stream is thy portion; they, they are thy lot: even to them hast thou poured a drink offering, thou hast offered a meat offering. Should I receive comfort in these? (KJV 57:4-6)
Sin is more than just casual wickedness. Failing to pay workers well, acting greedy and lustful—it also leads to horrific acts like child sacrifice.
For as the new heavens and the new earth, which I will make, shall remain before me, says the Lord; so shall your descendants and your name remain. From new moon to new moon, and from sabbath to sabbath, all flesh shall come to worship before me, says the Lord. And they shall go out and look at the dead bodies of the people who have rebelled against me; for their worm shall not die, their fire shall not be quenched, and they shall be an abhorrence to all flesh. (NRSV 66:22-24)
For as the new heavens and the new earth, which I will make, shall remain before me, saith the Lord, so shall your seed and your name remain. And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the Lord. And they shall go forth, and look upon the carcases of the men that have transgressed against me: for their worm shall not die, neither shall their fire be quenched; and they shall be an abhorring unto all flesh. (KJV 66:22-24)
Here, sin is itself the worm and the fire that respectively devour and burn the corpses of the wicked. It's worm-like because it gnaws and burrows on the inside. It's like fire because of its ability to consume and destroy everything.