en_tn/2co/01/12.md

testimony of our conscience

the proof given by Paul's and Timothy's thoughts about their own actions.

earthly wisdom

"human wisdom"

We do not write to you anything you cannot read or understand

"everything we write to you, you can read and understand" (See: rc://en/ta/man/translate/figs-litotes)

just as you will be ours

AT: "just as you will be our reason to be proud" (See: rc://en/ta/man/translate/figs-ellipsis)