In the gall of bitterness. Peter doth sharply reprove Simon again, and striketh him with God's judgment. For unless he had been compelled to descend into himself, he would never have been turned in good earnest unto God. For there is nothing more deadly for men which are blockish than when we flatter them, or when we do but a little scrape the skin, whereas they ought rather to be thrust through. Therefore, until such time as a sinner shall conceive sorrow and true heaviness by reason of his sin, we must use such severity as may wound his mind; otherwise the rotten sore shall be nourished within, which shall by little and little consume the man himself. Yet let us always observe this mean, that we provide for men's salvation so much as in us lieth. Moreover, there be two excellent fine metaphors in Peter's words; the one whereof seemeth to be taken out of Moses, where he forbiddeth that there be not in us any root, from which springeth gall and wormwood, (Deuteronomy 29.) By which speech is noted the inward wickedness of the heart; when as it hath so conceived the poison of ungodliness, that being therewith infected, it can bring forth nothing but bitterness. To the same end tendeth the binding of iniquity: to wit, when the whole heart is kept bound and tied by Satan. For it falleth out sometimes that men which are otherwise given very godlily, do break out into evil works, who have not their heart corrupt inwardly with poison. We know that hypocrisy is engendered in man's nature; but when as the Spirit of God doth shine, we are so blinded in our vices, that we nourish them within as if it were some hidden bundle. Therefore Peter's meaning is, that Simon fell not only in one point, but that his very heart root was corrupt and bitter; that he fell into Satan's snares not only in one kind of sin, but that all his senses were ensnared, so that he was wholly given over to Satan, and was become the bond-slave of iniquity. In the mean season, we are taught that the greatness of offenses is esteemed not so much according to the fact [1] which appeareth, as according to the affection of the heart.

Footnotes

1 - "Flagitio," flagitiousness.

For I perceive - That is, by the act which he had done. His offer had shown a state of mind that was wholly inconsistent with true religion. One single sin "may" as certainly show that there is no true piety as many acts of iniquity. It may be so decided, so malignant, so utterly inconsistent with just views as at once to determine what the character is. The sin of Simon was of this character. Peter here does not appear to have claimed the power of judging the "heart"; but he judged, as all other people would, by the act.
In the gall - This word denotes properly "bile," or "that bitter, yellowish-green fluid that is secreted in the liver." Hence, it means anything very bitter; and also any bad passion of the mind, as anger, malice, etc. We speak of "bitterness" of mind, etc.
Of bitterness - This is a Hebraism; the usual mode of expressing the "superlative," and means "excessive bitterness." The phrase is used respecting idolatry Deuteronomy 29:18, "Lest there should be among you a root that beareth gall and wormwood." A similar expression occurs in Hebrews 12:15, "Lest any root of bitterness springing up, trouble you." "Sin" is thus represented as a "bitter" or poisonous thing; a tiring not only "unpleasant" in its consequences, but ruinous in its character, as a poisonous plant would be in the midst of other plants, Jeremiah 2:19, "It is an evil and bitter thing that thou hast forsaken the Lord thy God"; Jeremiah 4:18; Romans 3:14, "Whose mouth is full of cursing and bitterness"; Ephesians 4:31. The meaning here is, that the heart of Simon was full of dreadful, malignant sin.
Bond of iniquity - Or, that thou art "bound by" iniquity. That is, that it has the rule over you, and "binds" you as a captive. Sin is often thus represented as "bondage" and "captivity," Psalm 116:16; Proverbs 5:22, "He shall be holden with the cords of his sins"; Romans 7:23-24. These expressions prove conclusively that Simon was a stranger to religion.

The gall of bitterness - A Hebraism for excessive bitterness: gall, wormwood, and such like, were used to express the dreadful effects of sin in the soul; the bitter repentance, bitter regret, bitter sufferings, bitter death, etc., etc., which it produces. In Deuteronomy 29:18, idolatry and its consequences are expressed, by having among them a root that beareth Gall and Wormwood. And in Hebrews 12:15, some grievous sin is intended, when the apostle warns them, lest any root of Bitterness springing up, trouble you, and thereby many be defiled.
Bond of iniquity - An allusion to the mode in which the Romans secured their prisoners, chaining the right hand of the prisoner to the left hand of the soldier who guarded him; as if the apostle had said, Thou art tied and bound by the chain of thy sin; justice hath laid hold upon thee, and thou hast only a short respite before thy execution, to see if thou wilt repent.

For I perceive that thou art in the (g) gall of bitterness, and [in] the (h) bond of iniquity.
(g) He calls the inward malice of the heart and the venomous and demonic wickedness with which the magician was wholly filled with the gall of bitterness: and he is said to be in the gall, as though he were wholly overwhelmed with gall, and buried in it.
(h) Entangled in the bonds of iniquity.

For I perceive that thou art in the gall of bitterness,.... Alluding to Deuteronomy 29:18 with which compare Hebrews 12:15 and signifying, that he was in a state of nature and unregeneracy; under the power and dominion of covetousness, ambition, and hypocrisy; and in a way pernicious to himself, infectious to others, and ungrateful to God, and to good men; and that instead of the root of the matter, the truth of grace being in him, there was nothing in him but the bitter root of sin; which bore gall and wormwood, and everything that was nauseous and disagreeable:
and in the bond of iniquity; referring to Proverbs 5:22 and suggesting, that he was held fast bound in the bonds of sin, and with the cords of iniquity, or was entirely under the government of his lusts: the preposition which we render "in", may retain here, as is by some observed, its proper sense of "for", or "into"; and have the same signification it has in Hebrews 1:5 "I will be to him for a father", or "a father", and "he shall be to me for a son", or "a son": and then the sense of Peter is, I plainly perceive and clearly see by thy words and actions, that thou art nothing else but a lump of bitter gall, and a bundle of sin and wickedness.

in the gall of bitterness and . . . bond of iniquity--expressing both the awfulness of his condition and the captivity to it in which he was held.