en_tn/2co/06/07.md

We are his servants in the word of truth, in the power of God

Their dedication to preach the gospel in the power of God proves that they are God's servants.

in the word of truth

"by speaking God's message about truth" or "by speaking God's true message"

in the power of God

"by showing God's power to people"

We have the armor of righteousness for the right hand and for the left

Paul speaks of their righteousness as if it were weapons that they use to fight spiritual battles. (See: rc://en/ta/man/translate/figs-metaphor)

the armor of righteousness

"righteousness as our armor" or "righteousness as our weapons"

for the right hand and for the left

Possible meanings are 1) that there is a weapon in one hand and a shield in the other or 2) that they are completely equipped for battle, able to fend off attacks from any direction.