Isaiah 32:4

“The heart also of the rash shall understand knowledge, &c.] Such who have been hasty and precipitant, as the wordf634 signifies; who have not given themselves time to consider what they have read or heard, or has been proposed unto them, and have hastily received every thing that has been suggested to them, especially by carnal sense and reason, shall now sit down, and coolly consider things, and so gain an understanding of divine and spiritual knowledge, of the knowledge of Christ, of his person, offices, grace, righteousness, and salvation; an experimental knowledge and understanding of these things, heart and not head knowledge: and the tongue of the stammerer shall be ready to speak…”

“rash--rather, "the hasty"; contrast "shall not make haste" (Isa 28:16); the reckless who will not take time to weigh religious truth aright. Or else, the well-instructed [HORSLEY]. stammers--those who speak confusedly on divine things (compare Exo 4:10-12; Jer 1:6; Mat 10:19-20). Or, rather, those drunken scorners who in stammering style imitated Isaiah's warnings to mock them [MAURER] (Isa 28:7-11, Isa 28:13-14, Isa 28:22; Isa 29:20); in this view, translate, "speak uprightly" (agreeably to the divine law); not as English Version, referring to the distinctness of articulation, "plainly."”

“The heart also of the rash - Margin, ‘Hasty.’ The Hebrew word denotes those who hasten; that is, those who are precipitate in forming a judgment, or deciding on a course of action. They do not take time to deliberate, and consequently they are led headlong into error, and into improper courses of life. Shall understand knowledge - They shall take time to deliberate; and they shall consequently form a more enlightened judgment. And the tongue of the stammerers - The ‘stammerers’ (compare the note at Isaiah 28:11) seem here to denote those who had indistinct and confused views of subjects, or who were incapable of expressing clear and intelligible views of divine truth. Shall be ready to speak…”

“The rash - Who were hasty in judging of things; which is an argument of ignorance and folly. The tongue - That used to speak of the things of God, darkly, and doubtfully; which though it was in part fulfilled in Hezekiah, yet was truly and fully accomplished only by Christ, who wrought this wonderful change in an innumerable company both of Jews and Gentiles. Isaiah 32:5”

“heart: Isa 29:24; Neh 8:8-12; Mat 11:25, Mat 16:17; Act 6:7, Act 26:9-11; Gal 1:23 rash: Heb. hasty the tongue: Exo 4:11; Sol 7:9; Luk 21:14, Luk 21:15; Act 2:4-12, Act 4:13 plainly: or, elegantly Isaiah 32:5”