Harder than adamant - The stone, whatever it be, was hard enough to cut ineffaceable characters : it was harder than flint . It would cut rocks; it could not be graven itself, or receive the characters of God.

This is the last sin, obduracy, persevering impenitence, which "resisted the Holy Spirit" Acts 7:51. and "did despite to the Spirit of grace" Hebrews 10:29. Not through infirmity, but of set purpose, they hardened themselves, lest "they should convert" Isaiah 6:10 and be healed. They feared to trust themselves to God's word, lest He should convert them by it.

Lest they should hear the law and the words which the Lord God sent by His Spirit by the hand of the former prophets - The Holy Spirit was the chief agent; "by His Spirit;" the inspired prophets were His instruments; by the hand of. Nehemiah confesses the same to God: "Thou didst protest to them by Thy Spirit by the hand of Thy prophets" Nehemiah 9:30. Moses was one of the greatest prophets. The law then may be included, either as delivered by Moses, or as being continually enforced by all the prophets. Observe the gradations:

(1) The words of God are not heard.

(2) The restive shoulder is shown; people turn away, when God, by the inner motions of His Spirit or by lesser chastisements, would bring them to the yoke of obedience. Osorius: "They would not bear the burden of the law, whereas they willingly bore that most heavy weight of their sins."

(3) Obduracy. Osorius: "Their adamantine heart could be softened neither by promises nor threats." Therefore nothing remained but the great wrath, which they had treasured to themselves against the day of wrath. And so Zechariah returns to that, wherewith his message and visions of future mercy began, the great wrath which fell upon their fathers Zechariah 1:7.

Osorius: "'I sought not,' He says, 'for your tears; I enjoined not bitterness of sorrow; but what, had they been done, the calamity, for which those tears were meet, had never befallen you. What was it which I admonished you formerly by the former prophets to recall you from sin? What I bid you by Zechariah now. This I preach, admonish, testify, inculcate upon you. '"

Made their hearts as an adamant stone - שמיר shamir may mean the granite. This is the hardest stone with which the common people could be acquainted. Perhaps the corundum, of which emery is a species, may be intended. Bochart thinks it means a stone used in polishing others. The same name, in Hebrew, applies to different stones.

Yea, they made their hearts as an adamant stone,.... The word here used is translated a "diamond" in Jeremiah 17:1 and it is said to be harder than a flint, Ezekiel 3:9. The Jewish writers say (g) it is a worm like a barley corn, so strong as to cut the hardest stones in pieces; Moses (they say) used it in hewing the stones for the two tables of the law, and in fitting the precious stones in the ephod; and Solomon in cutting the stones for the building of the temple; and is so hard that it cannot be broken by iron: and as hard is naturally the heart of man, and which becomes more so by sinning, and obstinate persisting in it, that nothing can remove the hardness of it but the powerful and efficacious grace of God: as hard as the adamant is, it is to be softened by the blood of a goat, as naturalists says (h); so the blood of Christ sprinkled on the heart, and a sense of forgiveness of sin by it, will soften the hardest heart:

lest they should hear the law, and the words which the Lord of hosts hath seat in his Spirit by the former prophets; the words of reproof, admonition, caution, and exhortation, which Jeremiah and others were sent to deliver to them, under the influence of the Spirit of God:

therefore came a great wrath from the Lord of hosts; which brought the Chaldeans upon them, who carried them captive into Babylon.

(g) Misn. Sota, c. 9. sect. 12. Pirke Abot. c. 5. sect. 5. & Maimon. & Bartenora in ib. Kimchi in 1 Reg. vi. 7. Jarchi in Isa. v. 6. (h) Pausan. Arcadica, sive l. 8. p. 485. Plin. Nat. Hist. l. 37. c. 4.

Yea, they made their hearts as an adamant stone, lest they should hear the law, and the words which the LORD of hosts hath sent in his {m} spirit by the former prophets: therefore came a great wrath from the LORD of hosts.

(m) Which declares that they did not only rebel against the Prophets, but against the Spirit of God that spoke in them.

7:12 In his spirit - By his holy spirit.

by: Heb. by the hand of

12. hearts . adamant-(Eze 3:9; 11:19).

Lord . sent in Spirit by . prophets-that is, sent by the former prophets inspired with His Spirit.

therefore . great wrath-(2Ch 36:16). As they pushed from them the yoke of obedience, God laid on them the yoke of oppression. As they made their heart hard as adamant, God brake their hard hearts with judgments. Hard hearts must expect hard treatment. The harder the stone, the harder the blow of the hammer to break it.

7:8-14 God's judgements upon Israel of old for their sins, were written to warn Christians. The duties required are, not keeping fasts and offering sacrifices, but doing justly and loving mercy, which tend to the public welfare and peace. The law of God lays restraint upon the heart. But they filled their minds with prejudices against the word of God. Nothing is harder than the heart of a presumptuous sinner. See the fatal consequences of this to their fathers. Great sins against the Lord of hosts, bring great wrath from his power, which cannot be resisted. Sin, if regarded in the heart, will certainly spoil the success of prayer. The Lord always hears the cry of the broken-hearted penitent; yet all who die impenitent and unbelieving, will find no remedy or refuge from miseries which while here they despised and defied, but which they then will not be able to bear.