Blessed is the people that know the joyful sound: they shall walk, O LORD, in the light of thy countenance. Blessed is the people - "O the blessednesses of that people (אשרי העם(elp ashrey haam) that know the joyful sound;" that are spared to hear the sound of the trumpet on the morning of the jubilee, which proclaims deliverance to the captives, and the restoration of all their forfeited estates. "They shall walk vigorously (יהלכון yehallechun) in the light of thy countenance" (באור פניך beor paneycha) - the full persuasion of the approbation of God their Father, Redeemer, and Sanctifier.
Related Commentaries of Psalms 89:15
Psalms 89:15
15 Blessed is the people that know the joyful sound: they shall walk, O LORD, in the light of thy countenance.