Blessed is the people that knoweth jubilation. They shall walk, O Lord, in the light of thy countenance:

“O Lord, "they shall walk in the light of Thy countenance." "They shall rejoice in Thy name all the day" (ver. 16). That Thabor and Hermon shall rejoice in Thy name: all day shall they rejoice, if they will, in Thy name; but if they will rejoice in their own name, they shall not rejoice all day: for they shall not continue in their joy, when they shall delight in themselves, and fall through pride. That they may rejoice all day, therefore, "they shall rejoice in Thy name, and in Thy righteousness shall they be exalted." Not in their own, but in Thine: lest they have a zeal of God, but not according to knowledge. For some are noted by the Apostle, that they have a zeal of God, but not according to knowledge, "being ignorant of God's righteousness, and going about to establish their own," and not rejoicing in Thy light, and thus "not submitting themselves unto the righteousness of God." And why? because "they have a zeal of God, but not according to knowledge." But the people who knoweth glad shouting (for the former err from want of knowledge, but blessed is the people not that knoweth not, but that knoweth glad shouting), whence ought it to shout, whence to rejoice, but in Thy name, walking in the light of Thy countenance? And it shall deserve to be exalted, but in Thy righteousness: let every man take away altogether his own righteousness, and be trembled: the righteousness of God shall come, and he shall be exalted, "and in Thy righteousness shall they be exalted."”

“For thou art the glory of their strength,.... By which they walk, and do all they do, exercise every grace, and discharge their duty; they have their strength from Christ, as well as their righteousness, without whom they can do nothing, but all things through him strengthening them; and as his righteousness exalts them, his strength adorns and glorifies them; how glorious and beautiful does a believer look, that is strong in the Lord, and in the power of his might, in the grace that is in Christ, and in the exercise of faith on him, giving glory to God; on whom the power of Christ rests, and it overshadows, and in whose weakness his strength is made perfect! and in thy favour our horn shall be exalted; either Christ, the Horn of their salvation, who in an acceptable time, in the time of God's favour, or good will, was heard and helped by him as man, carried through his sufferings and death, was raised from the dead, and exalted at his right hand; see Psa 89:24 or the saints themselves, their power and strength, kingdom and glory; by the special favour of God in Christ, their mountain is made so strong, and they so highly exalted, as that they think they shall never be moved; and in the latter day the mountain of the Lord's house shall be exalted above the hills, Psa 30:6.”