These two phrases mean basically the same thing and emphasize how much he will praise Yahweh. AT: "I will praise Yahweh with all that I am" (See: [[rc://en/ta/man/translate/figs-parallelism]])
This refers to praising Yahweh's name as Yahweh. (See: [[rc://en/ta/man/translate/figs-metonymy]])
# all that is within me
"all of me" or "all that I am." David uses this phrase to refer to himself and to emphasize his devotion to Yahweh. (See: [[rc://en/ta/man/translate/figs-synecdoche]])