In view of the wonders of grace and righteousness displayed in God's salvation, the whole creation is invited to unite in praise. (Psa 98:1-9)
gotten . . . victory--literally, "made salvation," enabled Him to save His people.
right hand, and . . . arm--denote power.
holy arm--or, "arm of holiness," the power of His united moral perfections (Psa 22:3; Psa 32:11).