The following comments are quoted from the NET Bible (The Net Bible – Copyright (2004) Biblical Studies Foundation. The home page of the NET Bible is http://www.bible.org/category.php?scid=5&category_id=71&parent_id=0). They are completely consistent with an Arminian understanding of God’s hardening of human hearts.
On Isaiah 6:10
Do we take this commission at face value? Does the Lord really want to prevent his people from understanding, repenting, and being healed? Verse 9, which ostensibly records the content of Isaiah’s message, is clearly ironic. As far as we know, Isaiah did not literally proclaim these exact words. The Hebrew imperatival forms are employed rhetorically and anticipate the response Isaiah will receive. When all is said and done, Isaiah might as well preface and conclude every message with these ironic words, which, though imperatival in form, might be paraphrased as follows: “You continually hear, but don’t understand; you continually see, but don’t perceive.” Isaiah might as well command them to be spiritually insensitive, because, as the preceding and following chapters make clear, the people are bent on that anyway. (This ironic command is comparable to saying to a particularly recalcitrant individual, “Go ahead, be stubborn!”) Verse 10b is also clearly sarcastic. On the surface it seems to indicate Isaiah’s hardening ministry will prevent genuine repentance. But, as the surrounding chapters clearly reveal, the people were hardly ready or willing to repent. Therefore, Isaiah’s preaching was not needed to prevent repentance! Verse 10b reflects the people’s attitude and might be paraphrased accordingly: “Otherwise they might see with their eyes, hear with their ears, understand with their mind, repent, and be restored, and they certainly wouldn’t want that, would they?” Of course, this sarcastic statement may also reveal that the Lord himself is now bent on judgment, not reconciliation. Just as Pharaoh’s rejection of Yahweh’s ultimatum ignited judgment and foreclosed, at least temporarily, any opportunity for repentance, so the Lord may have come to the point where he has decreed to bring judgment before opening the door for repentance once more. The sarcastic statement in verse 10b would be an emphatic way of making this clear. (Perhaps we could expand our paraphrase: “Otherwise they might…repent, and be restored, and they certainly wouldn’t want that, would they? Besides, it’s too late for that!”) Within this sarcastic framework, verse 10a must also be seen as ironic. As in verse 9 the imperatival forms should be taken as rhetorical and as anticipating the people’s response. One might paraphrase: “Your preaching will desensitize the minds of these people, make their hearing dull, and blind their eyes.” From the outset the Lord might as well command Isaiah to harden the people, because his preaching will end up having that effect. Despite the use of irony, we should still view this as a genuine, albeit indirect, act of divine hardening. After all, God did not have to send Isaiah. By sending him, he drives the sinful people further from him, for Isaiah’s preaching, which focuses on the Lord’s covenantal demands and impending judgment upon covenantal rebellion, forces the people to confront their sin and then continues to desensitize them as they respond negatively to the message. As in the case of Pharaoh, Yahweh’s hardening is not arbitrarily imposed on a righteous or even morally neutral object. Rather his hardening is an element of his righteous judgment on recalcitrant sinners. Ironically, Israel’s rejection of prophetic preaching in turn expedites disciplinary punishment, and brings the battered people to a point where they might be ready for reconciliation. The prophesied judgment (cf. 6:11-13) was fulfilled by 701 B.C. when the Assyrians devastated the land (a situation presupposed by Isa 1:2-20; see especially vv. 4-9). At that time the divine hardening had run its course and Isaiah is able to issue an ultimatum (1:19-20), one which Hezekiah apparently took to heart, resulting in the sparing of Jerusalem (see Isa 36-39 and cf. Jer 26:18-19 with Mic 3:12).This interpretation, which holds in balance both Israel’s moral responsibility and the Lord’s sovereign work among his people, is consistent with other pertinent texts both within and outside the Book of Isaiah. Isa 3:9 declares that the people of Judah “have brought disaster upon themselves,” but Isa 29:9-10 indicates that the Lord was involved to some degree in desensitizing the people. Zech 7:11-12 looks back to the pre-exilic era (cf. v. 7) and observes that the earlier generations stubbornly hardened their hearts, but Ps 81:11-12, recalling this same period, states that the Lord “gave them over to their stubborn hearts.”
On Isaiah 63:17
How direct this hardening is, one cannot be sure. The speaker may envision direct involvement on the Lord’s part. The Lord has brought the exile as judgment for the nation’s sin and now he continues to keep them at arm’s length by blinding them spiritually. The second half of 64:7 might support this, though the precise reading of the final verb is uncertain. On the other hand, the idiom of lament is sometimes ironic and hyperbolically deterministic. For example, Naomi lamented that Shaddai was directly opposing her and bringing her calamity (Ruth 1:20-21), while the author of Ps 88 directly attributes his horrible suffering and loneliness to God (see especially vv. 6-8, 16-18). Both individuals make little, if any, room for intermediate causes or the principle of sin and death which ravages the human race. In the same way, the speaker in Isa 63:17 (who evidences great spiritual sensitivity and is anything but “hardened”) may be referring to the hardships of exile, which discouraged and even embittered the people, causing many of them to retreat from their Yahwistic faith. In this case, the “hardening” in view is more indirect and can be lifted by the Lord’s intervention. Whether the hardening here is indirect or direct, it is important to recognize that the speaker sees it as one of the effects of rebellion against the Lord (note especially 64:5-6).