Led me out of the way, etc. It is indeed true, that while the will of God is hid from us, and no truth shines on us, the life of men goes wholly astray and is full of errors; nay, we do nothing but wander from the right course, until the law shows to us the way of living rightly: but as we begin then only to perceive our erroneous course, when the Lord loudly reproves us, Paul says rightly, that we are led out of the way, when sin is made evident by the law. Hence the verb, exapatan, must be understood, not of the thing itself, but of our knowledge; that is, that it is made manifest by the law how much we have departed from the right course. It must then be necessarily rendered, led me out of the way; for hence sinners, who before went on heedlessly, loathe and abominate themselves, when they perceive, through the light which the law throws on the turpitude of sin, that they had been hastening to death. But he away introduces the word occasion, and for this purpose -- that we may know that the law of itself does not bring death, but that this happens through something else, and that this is as it were adventitious. [1]

Footnotes

1 - This verse will be better understood if we consider it as in a manner a repetition, in another form, of what the former verse contains, and this is perfectly consistent with the usual manner of the Apostle. His object seems to have been to prevent a misapprehension of what he had said, that the commandment which was for life proved to be unto death. He hence says, that sin availed itself of the commandment, and by it deceived him, that is, promised him life, and then by it killed him, that is, proved fatal to him. There is a correspondence in meaning between the commandment unto life and deceiving, and between death and killing. In Romans 7:8, sin, as a person, is said to take advantage of the commandment to work every kind of sinful desires: but it is said here to take this advantage to deceive by promising life, and then to destroy, to expose, and subject him to death and misery. -- Ed.

For sin - This verse is a repetition, with a little variation of the sentiment in Romans 7:8.
Deceived me - The word used here properly means to lead or seduce from the right way; and then to deceive, solicit to sin, cause to err from the way of virtue, Romans 16:18; 1-Corinthians 3:18; 2-Corinthians 11:3, "The serpent beguiled Eve through his subtilty," 2-Thessalonians 2:3. The meaning here seems to be, that his corrupt and rebellious propensities, excited by the Law, led him astray; caused him more and more to sin; practiced a species of deception on him by urging him on headlong, and without deliberation, into aggravated transgression. In this sense, all sinners are deceived. Their passions urge them on, deluding them, and leading them further and further from happiness, and involving them, before they are aware, in crime and death. No being in the universe is more deladed than a sinner in the indulgence of evil passions. The description of Solomon in a particular case will apply to all, Proverbs 7:21-23.
"With much fair speech she caused him to yield,
With the flattering of her lips she forced him.
He goeth after her straightway,
As an ox goeth to the slaughter,
Or as a fool to the correction of the stocks;
Till a dart strike through his liver,
As a bird hasteth to the snare."
By it - By the Law, Romans 7:8.
Slew me - Meaning the same as "I died," Romans 7:8.

Sin, taking occasion - Sin, deriving strength from the law, threatening death to the transgressor, (see Clarke's note on Romans 7:8), deceived me, drew me aside to disobedience, promising me gratification honor, independence, etc., as it promised to Eve; for to her history the apostle evidently alludes, and uses the very same expression, deceived me, εξηπατησε με· See the preceding note; and see the Septuagint, Genesis 3:13.
And by it slew me - Subjected me to that death which the law denounced against transgressors; and rendered me miserable during the course of life itself. It is well known to scholars that the verb αποκτεινειν signifies not only to slay or kill, but also to make wretched. Every sinner is not only exposed to death because he has sinned, and must, sooner or later, die; but he is miserable in both body and mind by the influence and the effects of sin. He lives a dying life, or a living death.

For sin taking occasion by the commandment,.... As in Romans 7:8,
deceived me; either by promising pleasure or impunity: the same effect is ascribed by the Jews to the evil imagination or corruption of nature, which they say is called an enticer, , "that deceives man" (g):
and by it slew me; mortally wounded me: not the law, but sin by the law, deceived and slew him; so that as before, the law is cleared from being the cause of sin, so here, from being the cause of death; for though the law is a killing letter, the ministration of condemnation and death, yet it is not the cause of it; but sin, which is a transgression of the law, is that which deceives or leads out of the way, as the word signifies, and then kills. The metaphor is taken from a thief or a robber, who leads a man out of the way into some bypath, and then murders him.
(g) Tzeror Hammor, fol. 141. 3. & 150. 1.

Deceived me - While I expected life by the law, sin came upon me unawares and slew all my hopes.