John Gill

Is it not yet a very little while,.... In a short space of time, in a few years, what follows would come to pass; when there would be a strange change and alteration made in the world, and by which it would appear, that the Lord not only knows, but foreknows, all things: and Lebanon shall be turned into a fruitful field; the forest of Lebanon should be as Carmel. The meaning is, that the Gentile world, which was like a forest uncultivated, and full of unfruitful trees, to which wicked men may be compared, should through the preaching of the Gospel be manured, become God's husbandry, and be like a fruitful field, abounding with people and churches, fruitful in grace and good works: and the fruitful field shall be esteemed as a forest? the people of the Jews, who once had the word and ordinances of God, and were a fruitful and flourishing people in religion; through their rejection of the Messiah, and contempt of his Gospel, should be deprived of all their privileges, and become like a forest or barren land: this was fulfilled, when the kingdom of God was taken from them, and given to a nation bringing forth the fruits of it, Mat 21:43. See Isa 32:15.