Then shall the earth yield her increase - The word rendered “increase” - יבול yebûl - means properly produce, or that which the earth produces when properly cultivated. It is rendered “increase,” as here, in Leviticus 26:4, Leviticus 26:20; Deuteronomy 32:22; Judges 6:4; Job 20:28; Psalms 78:46; Psalms 85:12; Ezekiel 34:27; Zechariah 8:12; and fruit, in Deuteronomy 11:17; Habakkuk 3:17; Haggai 1:10. It does not elsewhere cccur. The Hebrew verb here is in the past tense - “has yielded her increase,” but the connection seems to demand that it shall be rendered in the future, as the entire psalm pertains to the future - to the diffusion of the knowledge of the way of God, Psalms 67:2; to the desire that the nations might praise him, Psalms 67:3-5; and to the fact that God would bless the people, Psalms 67:6-7. Thus understood, the idea is, that the prevalence of true religion in the world would be connected with prosperity, or that it would tend greatly to increase the productions of the earth. This, it would do,
(a) as such an acknowledgment of God would tend to secure the divine favor and blessing on those who cultivate the earth, preventing the necessity, by way of judgment, of cutting off its harvests by blight, and drought, and mildew, by frost, and storm, and destructive insects, caterpillars, and locusts;
(b) as it would lead to a much more extensive and general cultivation of the soil, bringing into the field multitudes, as laborers, to occupy its waste places, who are now idle, or intemperate, or who are cut down by vice and consigned to an early grave.
If all who are now idle were made industrious - as they would be by the influence of true religion; if all who by intemperance are rendered worthless, improvident, and wasteful, were made sober and working people; if all who are withdrawn from cultivating the earth by wars - who are kept in standing armies, consumers and not producers - or who are cut down in battle, should be occupied in tilling the soil, or should become producers in any way; and if all who are now slaves, and whose labor is not worth half as much as that of freemen, should be restored to their equal rights, - the productions of the earth would at once be increased many times beyond the present amount. The prevalence of true religion in the world, arresting the cause of idleness and improvidence, and keeping alive those who are now cut off by vice, by crime, and by the ravages of war, would soon make the whole world assume a different aspect, and would accomplish the prediction of the prophet Isaiah 35:1 that the “wilderness and the solitary place shall be glad, and that the desert shall rejoice and blossom as the rose.” The earth has never yet been half cultivated. Vast tracts of land are still wholly unsubdued and uninhabited. No part of the earth has yet been made to produce all that it could be made to yield; and no one can estimate what the teeming earth might be made to produce if it were brought under the influence of proper cultivation. As far as the true religion spreads, it will be cultivated; and in the days of the millenium, when the true religion shall be diffused over all continents and islands, the earth will be a vast fruitful field, and much of the beauty and the fertility of Eden be reproduced in every land.
And God, even our own God, shall bless us - The true God; the God whom we adore. That is, He will bless us with this abundant fertility; he will bless us with every needed favor.