en_tn/1ti/03/13.md

For those

"For those deacons" or "For these church leaders"

acquire for themselves

"receive for themselves" or "gain for themselves"

a good standing

The implied meaning may be stated explicitly. AT: "a good reputation among other believers" (See: rc://en/ta/man/translate/figs-explicit)

great confidence in the faith that is in Christ Jesus

Possible meanings are 1) they will trust in Jesus with even more confidence or 2) they will speak confidently to other people about their faith in Jesus.