Verse 16 - In thy Name shall they rejoice all the day: and in thy righteousness shall they be exalted. The "Name" and the "righteousness" of God form the glory of the Church, and are a perpetual source of rejoicing to her.

89:15-18 Happy are those who so know the joyful sound of the gospel as to obey it; who experience its power upon their hearts, and bring forth the fruit of it in their lives. Though believers are nothing in themselves, yet having all in Christ Jesus, they may rejoice in his name. May the Lord enable us to do so. The joy of the Lord is the strength of his people; whereas unbelief dispirits ourselves and discourages others. Though it steals upon us under a semblance of humility, yet it is the very essence of pride. Christ is the Holy One of Israel; and in him was that peculiar people more blessed than in any other blessing.In thy name shall they rejoice all the day,.... That know the joyful sound, and walk in the light of God's countenance, as they have reason to do; these will "rejoice" in the Lord himself, for his "name" is himself; in the perfections of his nature, as displayed in redemption and salvation by Christ; in him as the God of all grace, as their covenant God and Father in Christ, and the God of their salvation; and they will rejoice in Christ, in his name, in which is salvation, and therefore precious; in his person, blood, righteousness, sacrifice, and fitness; and that "all the day" long, continually; there is always reason, ground, and matter for rejoicing in Christ, though it is sometimes interrupted by sin, temptation, and desertion; see Philippians 4:4.

and in thy righteousness shall they be exalted; from a low estate of sin and misery to an high estate of grace and glory; from a state of condemnation and death to a state of justification of life; from being beggars on the dunghill, to sit among princes, and to inherit the throne of glory; such as are clothed with the righteousness of the Son of God are exalted to great honour, as to be admitted into the presence of the King of kings in raiment of needlework, to stand at his right hand in gold of Ophir, and to live and reign with him for evermore in his kingdom and glory.