This phrase means that he will praise Yahweh wholeheartedly and is used to emphasize his devotion to him. AT: "with all of me" or "with all my soul"(See: [[rc://en/ta/man/translate/figs-metonymy]])
The words "splendor" and "majesty" have similar meanings and emphasize the greatness of Yahweh's glory. They are described as clothing Yahweh like a garment. AT: "you have splendor and majesty all around you" (See: [[rc://en/ta/man/translate/figs-doublet]] and [[rc://en/ta/man/translate/figs-metaphor]])