Isaiah 1:19

“If ye be willing and obedient, &c.] The Targum adds, “to my Word”: the Word made flesh, and dwelling among them; who would have gathered the inhabitants of Jerusalem to his ministry, to attend his word and ordinances, but their rulers would not: ye shall eat the good of the land; the land of Canaan; as the Jews held the possession of that land, before the times of Christ, by their obedience to the laws of God, which were given them as a body politic, and which, so long as they observed, they were continued in the quiet and full enjoyment of all the blessings of it; so, when Christ came, had they received, embraced, and acknowledged him as the Messiah, and been obedient to his will, though…”

“Temporal blessings in "the land of their possession" were prominent in the Old Testament promises, as suited to the childhood of the Church (Exo 3:17). New Testament spiritual promises derive their imagery from the former (Mat 5:5).”

“If ye be willing - If you submit your wills, and become voluntary in your obedience to my law. And obedient - Hebrew If you will hear; that is, my commands. Ye shall eat ... - That is, the land shall yield its increase; and you shall be saved from pestilence, war, famine, etc. The productions of the soil shall no more be devoured by strangers, Isaiah 1:7; compare the notes at Isaiah 65:21-23. This was in accordance with the promises which God made to their fathers, and the motives to obedience placed before them, which were drawn from the fact, that they should possess a land of distinguished fertility, and that obedience should be attended with eminent national prosperity. Such an appeal…”

“If - If you are fully resolved to obey all my commands. Shall eat - Together with pardon, you shall receive temporal and worldly blessings. Isaiah 1:21”

“1:19-20 Repentance leads to life, whereas resisting God’s will and turning away from him results in death (see Deut 11:26-28; 28:1-62).”

“Isa 3:10, Isa 55:1-3, Isa 55:6, Isa 55:7; Jer 3:12-14, Jer 31:18-20; Hos 14:1-4; Joe 2:26; Mat 21:28-32; Heb 5:9 Isaiah 1:20”

“But after the restoration of Israel in integrum by this act of grace, the rest would unquestionably depend upon the conduct of Israel itself. According to Israel's own decision would Jehovah determine Israel's future. "If ye then shall willingly hear, ye shall eat the good of the land; if ye shall obstinately rebel, ye shall be eaten by the sword: for the mouth of Jehovah hath spoken it." After their justification, both blessing and cursing lay once more before the justified, as they had both been long before proclaimed by the law (compare Isa 1:19 with Deu 28:3., Lev 26:3., and Isa 1:20 with the threat of vengeance with the sword in Lev 26:25). The promise of eating, i.e., of the full…”