en_tn/2co/07/15.md

the obedience of all of you

This noun "obedience" can be stated with a verb, "obey." AT: "how all of you obeyed" (See: rc://en/ta/man/translate/figs-abstractnouns)

you welcomed him with fear and trembling

Here "fear" and "trembling" share similar meanings and emphasize the intensity of fear. AT: "you welcomed him with great reverence" (See: rc://en/ta/man/translate/figs-doublet)

with fear and trembling

Possible meanings are 1) "with great reverence for God" or 2) "with great reverence for Titus."