And if a soul sin, and commit any of these things which are forbidden to be done by the commandments of the LORD; though he wist it not, yet is he guilty, and shall {i} bear his iniquity.

(i) That is, remembers after that he has sinned when his conscience accuses him.

Wesley's Notes

5:17 The former law concerns the alienation of holy things from sacred to common use; this may concern other miscarriages about holy things, and holy duties, as may be gathered from Lev 5:19, where this is said to be a trespass against the Lord, not in a general sense, for so every sin was; but in a proper and peculiar sense.

Jamieson-Fausset-Brown Bible Commentary

17-19. if a soul sin . though he wist it not, yet is he guilty-This also refers to holy things, and it differs from the preceding in being one of the doubtful cases,-that is, where conscience suspects, though the understanding be in doubt whether criminality or sin has been committed. The Jewish rabbis give, as an example, the case of a person who, knowing that "the fat of the inwards" is not to be eaten, religiously abstained from the use of it; but should a dish happen to have been at table in which he had reason to suspect some portion of that meat was intermingled, and he had, inadvertently, partaken of that unlawful viand, he was bound to bring a ram as a trespass offering [Le 5:16]. These provisions were all designed to impress the conscience with the sense of responsibility to God and keep alive on the hearts of the people a salutary fear of doing any secret wrong.

Matthew Henry's Concise Commentary

5:14-19 Here are offerings to atone for trespasses against a neighbour. If a man put to his own use unwittingly, any thing dedicated to God, he was to bring this sacrifice. We are to be jealous over ourselves, to ask pardon for the sin, and make satisfaction for the wrong, which we do but suspect ourselves guilty of. The law of God is so very broad, the occasions of sin in this guilty of. The law of God is so very broad, the occasions of sin in this world are so numerous, and we are so prone to evil, that we need to fear always, and to pray always, that we may be kept from sin. Also we should look before us at every step. The true Christian daily pleads guilty before God, and seeks forgiveness through the blood of Christ. And the gospel salvation is so free, that the poorest is not shut out; and so full, that the most burdened conscience may find relief from it. Yet the evil of sin is so displayed as to cause every pardoned sinner to abhor and dread it.

Matthew Henry's Whole Bible Commentary

Verses 14-19

Hitherto in this chapter orders were given concerning those sacrifices that were both sin-offerings and trespass-offerings, for they go by both names, v. 6. Here we have the law concerning those that were properly and peculiarly trespass-offerings, which were offered to atone for trespasses done against a neighbour, those sins we commonly call trespasses. Now injuries done to another may be either in holy things or in common things; of the former we have the law in these verses; of the latter in the beginning of the next chapter. If a man did harm (as it is v. 16) in the holy things of the Lord, he thereby committed a trespass against the priests, the Lord's ministers, who were entrusted with the care of these holy things, and had the benefit of them. Now if a man did alienate or convert to his own use any thing that was dedicated to God, unwittingly, he was to bring this sacrifice; as suppose he had ignorantly made use of the tithes, or first-fruits, or first-born of his cattle, or (which, it should seem by ch. 22:14-16, is principally meant here) had eaten any of those parts of the sacrifices which were appropriated to the priests; this was a trespass. It is supposed to be done through mistake, or forgetfulness, for want either of care or zeal; for if it was done presumptuously, and in contempt of the law, the offender died without mercy, Heb. 10:28. But in case of negligence and ignorance this sacrifice was appointed; and Moses is told, 1. What must be done in case the trespass appeared to be certain. The trespasser must bring an offering to the Lord, which, in all those that were purely trespass-offerings, must be a ram without blemish, "of the second year," say the Jewish doctors. He must likewise make restitution to the priest, according to a just estimation of the thing which he had so alienated, adding a fifth part to it, that he might learn to take more heed next time of embezzling what was sacred to God, finding to his cost that there was nothing got by it, and that he paid dearly for his oversights. 2. What must be done in case it were doubtful whether he had trespassed or no; he had cause to suspect it, but he wist it not (v. 17), that is, he was not very certain; in this case, because it is good to be sure, he must bring his trespass-offering, and the value of that which he feared he had embezzled, only he was not to add the fifth part to it. Now this was designed to show the very great evil there is in sacrilege. Achan, that was guilty of it presumptuously, died for it; so did Ananias and Sapphira. But this goes further to show the evil of it, that if a man had, through mere ignorance, and unwittingly, alienated the holy things, nay, if he did but suspect that he had done so, he must be at the expense, not only of a full restitution with interest, but of an offering, with the trouble of bringing it, and must take shame to himself, by making confession of it; so bad a thing is it to invade God's property, and so cautious should we be to abstain from all appearances of this evil. We are also taught here to be jealous over ourselves with a godly jealousy, to ask pardon for the sin, and make satisfaction for the wrong, which we do but suspect ourselves guilty of. In doubtful cases we should take and keep the safer side.