Psalms 89:15

Blessed is the people that know the joyful sound. It is a blessed God of whom the Psalmist has been singing, and therefore they are a blessed people who partake of his bounty, and know how to exult in his favour. Praise is a peculiarly joyful sound, and blessed are those who are familiar with its strains. The covenant promises have also a sound beyond measure precious, and they are highly favoured who understand their meaning and recognise their own personal interest in them. There may also be a reference here to the blowing of trumpets and other glad noises which attended the worship of Jehovah, who, unlike the gods of the heathen was not adored by the shrieks of wretched victims, or the yells and outcries of terror stricken crowds, but by the joyful shouts of his happy people. They shall walk, O Lord, in the light of thy countenance. For them it is joy enough that Jehovah is favourable to them; all day long this contents them and enables them with rigour to pursue their pilgrimage. Only a covenant God could look with favour upon men, and those who have known him in that relationship learn to rejoice in him, yea, to walk with him in fellowship, and to continue in communion with him. If we give God our ear and hear the joyful sound, he will shew us his face and make us glad. While the sun shines, men walk without stumbling as to their feet, and when the Lord smiles on us we live without grief as to our souls.

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.

Blessed is the people - Happy is their condition. See the notes at Psa 1:1. That know the joyful sound - That hear that sound. DeWette explains this of the call to the festivals and offerings, Lev 23:24; Num 10:10; Psa 27:6. That is, says he, those who honor and worship God. The Hebrew word - תרועה terû‛âh - means a loud noise; a tumult; especially, shouts of joy, or rejoicing, Job 8:21; 1Sa 4:5; the “shout of a king,” that is, the joyful acclamations with which a king is welcomed, Num 23:21; the shout of battle, Jer 4:19; Jer 49:2. Then it means the sound or clangor of trumpets, Lev 25:9; Num 29:1-6. The word is, therefore, especially applicable to the sounding of the trumpets which attended the celebration of the great; festivals among the Hebrews, and there can be little doubt that this is the reference here. The idea is, that they are blessed or happy who are the worshippers of Yahweh, the true God; who are summoned to his service; who are convened to the place of his worship. They shall walk, O Lord, in the light of thy countenance - They shall live in thy favor, and enjoy thy smiles.