# when he comes on that day

Here "that day" is the day when Jesus will return to the world.

# to be glorified by his people and to be marveled at by all those who believed

This can be stated in active form. Alternate translation: "when his people will glorify him and all those who believed will stand in awe of him" (See: [[rc://en/ta/man/translate/figs-activepassive]])