(12) They are together become unprofitable.--Here the adjective is used to express a state of moral corruption and depravity. "Together" means "altogether;" "the whole mass of mankind, with one consent, has fallen to ruin."

3:9-18 Here again is shown that all mankind are under the guilt of sin, as a burden; and under the government and dominion of sin, as enslaved to it, to work wickedness. This is made plain by several passages of Scripture from the Old Testament, which describe the corrupt and depraved state of all men, till grace restrain or change them. Great as our advantages are, these texts describe multitudes who call themselves Christians. Their principles and conduct prove that there is no fear of God before their eyes. And where no fear of God is, no good is to be looked for.They are all gone out of the way,.... In Psalm 14:3; it is said, "they are all gone aside"; as persons in debt: man had a considerable stock of righteousness, holiness, knowledge, &c. but he has run through all, has contracted large and numerous debts, has been obliged to hide himself, has been used as a bankrupt, and turned out of house and home: Christ indeed has undertook to pay, and he has paid all the debts of his people; and has put them into a better state than ever Adam was in: in Psalm 53:3, it is rendered, "everyone of them is gone back"; that is, from God; from his commands, and from their former state and condition: here the phrase is rendered by the apostle, "they are all gone out of the way": that is, out of the way of God and his precepts, out of the way of holiness and righteousness, of light and life; into their own ways, the ways of sin, Satan, and the world of darkness, and of death: so Aben Ezra explains it, "out of the right way"; Kimchi and Ben Melech paraphrase it, "out of the good way: and so"

they are together become unprofitable; the word in Psalm 14:3 and Psalm 53:3; is translated, "they are become filthy"; which R. Aben Ezra interprets by "they are corrupt"; and R. Solomon Jarchi by , "they are turned to corruption"; the metaphor is taken from stinking flesh, which is tainted and corrupted, and so good for nothing, hence here rendered "unprofitable"; for so men being corrupted by sin, are of no use, service, and advantage to God, to men, or to themselves; but, on the contrary, nauseous to God, and to all that are good, and hurtful to themselves and others: for

there is none that does good, no, not one; and therefore must be unprofitable. There is none that can do good in a spiritual manner, without the grace of God, strength from Christ, and the assistance of the Spirit; and there is not even a spiritual man, that can do good perfectly, and without sin.