Be glad in the LORD, and rejoice, you righteous: and shout for joy, all you that are upright in heart.
Read Chapter 32
Augustine of Hippo
AD 430
11. "Be glad in the Lord, and rejoice, ye righteous:" be glad, and rejoice, ye righteous, not in yourselves, but in the Lord. "And glory, all ye that are right in heart" (ver. 11): and glory in Him, all ye who understand that it is right to be subject unto Him, that so ye may be placed above all things beside.
Glory, which is lawful when God is the object, 1 Corinthians i. 31. My glory I will not give to another, Isaias xlii. 8. (Calmet)
Hebrew, "praise him. "(St. Jerome) (Haydock)
Joy is the end of true penance, to which the prophet invites all. (Worthington)