Surely I declare my iniquity. By comparison, he amplifies what he had just said concerning the pride and the reproachful conduct of his enemies; for he says, that whilst he is lying in a filthy and wretched condition, like a wicked man, and one abandoned by God, they fly about in mirth and gladness, nay, they carry their heads high, because they are rich and powerful. But first, it is proper to notice in what sense it is that he declares his sin. Those, in my judgment, are mistaken, who understand this passage simply in the sense of a confession of his guilt before God, that he might obtain forgiveness. According to their interpretation, the Psalmist is supposed to repeat here what we have seen he said "I acknowledged my sin unto thee, and mine iniquity have I not hid."-- (Psalm 32:5) But in this place he is not speaking so much of his repentance, as he is bewailing his sad and miserable condition; and, therefore, sin and iniquity are to be understood of the afflictions and chastisements which are the tokens of God's wrath; as if he had said, that the hand of God was against him, and lying so heavily upon him, that from the very sight of the misery to which he was reduced, the world in general might regard him as a condemned and reprobate man. In order to render the meaning more obvious, the 18th and 19th verses must be read together, thus: I declare my iniquity, and my enemies are living; I am dismayed because of my sin, but they are become strong. I do not, however, deny that he regards the miseries to which he was subjected as proceeding from his sins. In this respect, the godly differ from the wicked, that, being admonished of their transgression by adversity, they humbly sist themselves before the judgment-seat of God. Accordingly, judging of the cause from the effects, he takes into account these two things: First, That thus overwhelmed and afflicted, he is lying under a heavy load of miseries; and, secondly, That all these evils are justly inflicted as chastisements for sin. This living, [1] which he attributes to his enemies, implies as much as to enjoy continued and abundant prosperity in all things; and therefore he adds, that they are become strong and increase in power I interpret the word rvv, rabbab, in this place, increase in power, because he would speak improperly were he to be understood as saying, that they were multiplied. He does not here complain that they increased in number, but rather exalts their greatness, because the more they acquired of riches, they acquired so much the greater audacity in oppressing the good and the simple. He tells us that he is assailed by them wrongfully, and without cause, that he may induce God to be the more favorable and propitious to him. And surely, if we would have the favor of God for our defense, we must always take care not to injure any man, and to do nothing to provoke the hatred of any against us. This is more fully confirmed in the following verse, in which he declares that they requited him evil for the good which he had done them. More than this, however, is implied in the language of David. It implies that he not only abstained from all hurtful dealing towards his enemies, but that he had done them all the good which was in his power; and on this account the rage of the wicked is the less excusable, which not only moves them to do harm to others without cause, but which likewise cannot be appeased by any marks of kindness exercised towards them. It is indeed true, that there is nothing which wounds those of an ingenuous disposition of mind more than when wicked and ungodly men recompense them in a manner so dishonorable and unjust; but when they reflect upon this consolatory consideration, that God is no less offended with such ingratitude than those to whom the injury is done, they have no reason to be troubled beyond measure. To mitigate their sorrow, let this doctrine be the subject of their frequent meditation, That whenever the wicked, to whom we have endeavored to do good, shall requite us evil for good, God will certainly be their judge. In the last place, it is added, as the highest degree of their desperate wickedness, that they hated David because he studied to practice uprightness: They are opposed to me, because I follow that which is good It must be admitted, that those are froward and wicked in the extreme, nay, even of a devilish disposition, who hold uprightness in such abhorrence that they deliberately make war upon those who follow after it. It is, indeed, a very sore temptation, that the people of God, the more sincerely they endeavor to serve him, should procure to themselves so much the more trouble and sorrow; but this consideration ought to prove a sufficient ground of consolation to them, that they are not only supported by the testimony of a good conscience, but that they also know that God is ever ready, and that, too, for this very reason, to manifest his mercy towards them. On the ground of this assurance, they dare to appear in the presence of God, and entreat him, as it is his cause as well as theirs, that he would maintain and defend it. There can be no doubt that David, by his own example, has prescribed this as a common rule to all the faithful, rather to incur the hatred and ill-will of the world, than in the least degree to swerve from the path of duty, and without any hesitation to regard those as their enemies whom they know to be opposed to that which is just and righteous.

Footnotes

1 - Ainsworth reads, "are alive, or living;" "that is," says he, "lively, lusty, cheerful, hale, and sound, or rich, as the word seemeth to mean in Ecclesiastes 6:8." Dr Lowth, instead of chyym, chayim, living, proposes to read here ch'nm, chinam, without cause -- without cause have strengthened themselves. "I think," says he, "chynm, here for chyym, is a remarkable instance of a reading merely conjectural, unsupported by any authority but that of the context, of the truth of which, no possible doubt can be made. Hare and Houbigant, and I suppose every other competent reader, has hit upon it. You see the two hemistichs are parallel and synonymous, word answering to word." -- Dr Lowth in Mr Merrick's Note on this place. -- Street and Dr Adam Clarke agree in this alteration.

For I will declare mine iniquity - That is, he was not disposed to hide his sin. He would make no concealment of the fact that he regarded himself as a sinner. He admitted this to be true, and he admitted that his sin was the cause of all his troubles. It was the fact that he was a sinner that so painfully affected his mind; and he was not disposed to attempt to conceal it from anyone.
I will be sorry for my sin - I will not deny it; I will not apologize for it. I admit the truth of what my conscience charges on me; I admit the correctness and the propriety of the divine judgment by which I have been affiicted on account of my sin; I desire to repent of all my transgressions, and to turn from them. Compare Leviticus 26:41. The calamity brought upon the psalmist for his sin had produced the desired effect in this respect, that it had brought him to true repentance; and now, with the full confession of his sin, he was anxious only lest he should fall utterly, and should give his enemies, and the enemies of the truth, the occasion to triumph over him which they desired.

I will declare mine iniquity - I will confess it with the deepest humiliation and self-abasement.

For I will declare mine iniquity,.... Either to men, to ease his mind, justify God in his proceedings with him, and for their caution and admonition: or rather to God, against whom he had sinned, and who only could pardon him; with a view to which he was determined to make a free and open confession of it before him:
I will be sorry for my sin, or "careful" (p) about it; that is, how he committed it for the future: true repentance for sin produces a carefulness to abstain from all appearance of it; see 2-Corinthians 7:10.
(p) "solicitus ero", Montanus; so Junius & Tremellius, Piscator, Gejerus, Michaelis, Ainsworth.

Consciousness of sin makes suffering pungent, and suffering, rightly received, leads to confession.

Declare - To thee.