General Information:

The summary comes toward the end with an appeal to worship only Yahweh.

with great power and a raised arm

The phrase "raised arm" is metonymy for displaying power and means basically the same thing as "great power." Alternate translation: "with very great power" (See: rc://en/ta/man/translate/figs-metonymy and rc://en/ta/man/translate/figs-doublet)