Biblical Commentary on the Old Testament, by Carl Friedrich Keil and Franz Delitzsh, [1857-78], at sacred-texts.com
Harvest Thanksgiving Song
Like Psa 65:1-13, this Psalm, inscribed To the Precentor, with accompaniment of stringed instruments, a song-Psalm (מזמור שׁיר), also celebrates the blessing upon the cultivation of the ground. As Psa 65:1-13 contemplated the corn and fruits as still standing in the fields, so this Psalm contemplates, as it seems, the harvest as already gathered in, in the light of the redemptive history. Each plentiful harvest is to Israel a fulfilment of the promise given in Lev 26:4, and a pledge that God is with His people, and that its mission to the whole world (of peoples) shall not remain unaccomplished. This mission-tone referring to the end of God's work here below is unfortunately lost in the church's closing strain, "God be gracious and merciful unto us," but it sounds all the more distinctly and sweetly in Luther's hymn, "Es woll uns Gott genהdig sein," throughout.
There are seven stanzas: twice three two-line stanzas, having one of three lines in the middle, which forms the clasp or spangle of the septiad, a circumstance which is strikingly appropriate to the fact that this Psalm is called "the Old Testament Paternoster" in some of the old expositors.
(Note: Vid., Sonntag's Tituli Psalmorum (1687), where it is on this account laid out as the Rogate Psalm.)
The second half after the three-line stanza beings in Psa 67:6 exactly as the first closed in Psa 67:4. יברכנוּ is repeated three times, in order that the whole may bear the impress of the blessing of the priest, which is threefold.
The Psalm begins (Psa 67:1) with words of the priest's benediction in Num 6:24-26. By אתּנוּ the church desires for itself the unveiled presence of the light-diffusing loving countenance of its God. Here, after the echo of the holiest and most glorious benediction, the music strikes in. With Psa 67:2 the Beracha passes over into a Tephilla. לדעת is conceived with the most general subject: that one may know, that may be known Thy way, etc. The more graciously God attests Himself to the church, the more widely and successfully does the knowledge of this God spread itself forth from the church over the whole earth. They then know His דּרך, i.e., the progressive realization of His counsel, and His ישׁוּעה, the salvation at which this counsel aims, the salvation not of Israel merely, but of all mankind.
Now follows the prospect of the entrance of all peoples into the kingdom of God, who will then praise Him in common with Israel as their God also. His judging (שׁפט) in this instance is not meant as a judicial punishment, but as a righteous and mild government, just as in the christological parallels Psa 72:12., Isa 11:3. מישׁר in an ethical sense for מישׁרים, as in Psa 45:7; Isa 11:4; Mal 2:6. הנחה as in Psa 31:4 of gracious guidance (otherwise than in Job 12:23).
The joyous prospect of the conversion of heathen, expressed in the same words as in Psa 67:5, here receives as its foundation a joyous event of the present time: the earth has just yielded its fruit (cf. Psa 85:13), the fruit that had been sown and hoped for. This increase of corn and fruits is a blessing and an earnest of further blessing, by virtue of which (Jer 33:9; Isa 60:3; cf. on the contrary Joe 2:17) it shall come to pass that all peoples unto the uttermost bounds of the earth shall reverence the God of Israel. For it is the way of God, that all the good that He manifests towards Israel shall be for the well-being of mankind.