C. F. Keil and Franz Delitzsch on Psalms 67:2

Psa 67:1-2

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.