The interpretation timeline
Psalm 85:12 Douay-Rheims

Truth is sprung out of the earth: and justice hath looked down from heaven.

A.D. 430 – 1771 3 witnesses 5 excerpts

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“"Truth has sprung out of the earth, and righteousness has looked down from heaven" [Psalm 85:11]. "Truth has sprung out of the earth:" Christ is born of a woman. The Son of God has come forth of the flesh. What is truth? The Son of God. What is the earth? Flesh. Ask whence Christ was born, and you see that "Truth is sprung out of the earth." But the Truth which sprang out of the earth was before the earth, and by It the heaven and the earth were made: but in order that righteousness might look down from heaven, that is, in order that men might be justified by Divine grace, Truth was born of the Virgin Mary; that He might be able to offer a sacrifice to justify them, the sacrifice of suffering, the sacrifice of the Cross. And how could He offer a sacrifice for our sins, except He died? How could He die, except He received from us that wherein He might die; that is, unless He received from us mortal flesh, Christ could not have died: because the Word of God dies not, Godhead dies not, the Virtue and Wisdom of God does not die. How should He offer a sacrifice, a healing victim, if He died not? How should He die, unless He clothed Himself with flesh? How should He put on flesh, except truth sprang out of the earth?”
Source
“"For the Lord shall give sweetness, and our land shall give her increase" [Psalm 85:12]....He will give unto you the sweetness of working righteousness, so that righteousness shall begin to delight you, whom before unrighteousness delighted: so that thou who at first delighted in drunkenness, shall rejoice in sobriety: and thou who at first rejoiced in theft, so as to take from another man what you had not, shall seek to give to him that has not that which you have: and thou who took delight in robbing, shall delight now in giving: thou whom shows delighted, shall delight in prayer; thou who delighted in trifling and lascivious songs, shall now delight in singing hymns to God; in running to church, thou who at first ran to the theatre. Whence is that sweetness born to you, except from this, that "God gives sweetness"? For, behold, you see what I mean: behold, I have spoken unto you the word of God, I have sown seed in your devout hearts, finding your souls furrowed, as it were, with the plough of confession: with devout attention you have received the seed; think now upon the word which you have heard, like those who break up the clouds, lest the fowls should carry away the seed, that what is sown may be able to spring up there: and unless God rain upon it, what profits it that it is sown? This is what is meant by "our land shall give her increase." May He with His visitations, in leisure, in business, in your house, in your bed, at meal-time, in conversation, in walks, visit your hearts, when we are not by. May the rain of God come and make to sprout what is sown there: and when we are not by, and are resting quietly, or otherwise employed, may God give increase to the seeds which we have sown, that remarking afterwards your improved characters, we too may rejoice for your fruit.”
Source
“We were wolves. "We too were by nature children of wrath just like the rest." But the sheep died and turned us into sheep. "Behold the Lamb of God, behold him who takes away the sin," not of this person or that, but "of the world." So then, my brothers, let us claim no credit for anything we are, provided it is by faith in him we are whatever we are—let us claim no credit for ourselves, or we may lose what we have received. But for whatever we have received let us give him the glory, him the honor, and may he water the seeds he has sown. What would our land have if he had not sown anything? He too sends the rain. He does not abandon what he has sown. "The Lord will give his sweetness, and our land will yield its fruit."”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“Truth will sprout from the earth, etc. When Israel will speak truth, the charity that they perform on earth will look down from heaven.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Yea, the Lord shall give that which is good,.... Meaning not merely temporal good, as rain in particular, as some think, because of the following clause; but that which is spiritually good, his good Spirit and his grace, grace and glory: nor will he withhold any good thing from his people; every good and perfect gift comes from him: and our land shall yield her increase; such who are like to the earth, which receives blessing of God, and oft drinks in the rain that comes upon it, and brings forth herbs to the dresser of it, Heb 6:2, these increase with the increase of God, bring forth fruits of righteousness, and grow in grace and in the knowledge of Christ; though the whole may be interpreted of the incarnation of Christ, which agrees with what goes before and follows after; see Psa 67:6.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.