Jeremia 17:9

deceitful--from a root, "supplanting," "tripping up insidiously by the heel," from which Jacob (Hos 12:3) took his name. In speaking of the Jews' deceit of heart, he appropriately uses a term alluding to their forefather, whose deceit, but not whose faith, they followed. His "supplanting" was in order to obtain Jehovah's blessing. They plant Jehovah for "trust in man" (Jer 17:5), and then think to deceive God, as if it could escape His notice, that it is in man, not in Him, they trust. desperately wicked--"incurable" [HORSLEY], (Mic 1:9). Trust in one's own heart is as foolish as in our fellow man (Pro 28:26).

The heart is deceitful above all things,.... This is the source of the idolatry and creature confidence of the Jews, sins which were the cause of their ruin; and though what is here said is particularly applicable to their hearts, yet is in general true of the heart of every man; which is "deceitful", and deceiving; and puts a cheat upon the man himself whose it is: it deceives him with respect to sin; it proposes it to him under the notion of pleasure; it promises him a great deal in it, but does not yield a real pleasure to him; it is all fancy and imagination; a mere illusion and a dream; and what it gives is very short lived; it is but for a season, and ends in bitterness and death: or it proposes it under the notion of profit; it promises him riches, by such and such sinful ways it suggests; but, when he has got them, he is the loser by them; these deceitful riches choke the word, cause him to err from the faith, pierce him through with many sorrows, and endanger the loss of his soul: it promises honour and preferment in the world, but promotes him to shame; it promises him liberty, but brings him into bondage; it promises him impunity, peace, and security, when sudden destruction comes: it deceives him in point of knowledge; it persuades him that he is a very knowing person, when he is blind and ignorant, and knows nothing as he ought to know; and only deceives himself; for there is no true knowledge but of God in Christ, and of a crucified Christ, and salvation by him; see Co1 3:18 it deceives in the business of religion; it makes a man believe that he is a very holy and righteous man, and in a fair way for heaven, when he is far from that, and the character it gives him; in order to this, it suggests to him that concupiscence or lust, or the inward workings of t…

In this chapter, I. God convicts the Jews of the sin of idolatry by the notorious evidence of the fact, and condemns them to captivity for it (Jer 17:1-4). II. He shows them the folly of all their carnal confidences, which should stand them in no stead when God's time came to contend with them, and that this was one of the sins upon which his controversy with them was grounded (Jer 17:5-11). III. The prophet makes his appeal and address to God upon occasion of the malice of his enemies against him, committing himself to the divine protection, and begging of God to appear for him (Jer 17:12-18). IV. God, by the prophet, warns the people to keep holy the sabbath day, assuring them that, if they did, it should be the lengthening out of their tranquility, but that, if not, God would by some desolating judgment assert the honour of his sabbaths (Jer 17:19-27).

17:9-10 By nature, the human heart is deceitful and desperately wicked. Only the Lord really knows how bad it is.