55 ἐν 9.a, “ἐν τούτῳ πιστεύομεν this is the reason why we believe Jn 16:30; cp. Ac 24:16.”
56 διά 2.a, “διὰ παντός … always, continually, constantly … Ac 2:25 (Ps 16:8); 10:2; 24:16.” However, the positioning of the adverb “always” in the English translation is difficult; the position used is one of the least awkward.
57 ἀπρόσκοπος 1 has “ἀ. συνείδησις a clear conscience Ac 24:16.”
58 Grk “men,” but this is a generic use (Paul does not have only males in view).

In other versions

So I always take pains to have a clear conscience toward both God and man.

So I strive always to keep my conscience clear before God and man.

I always strive to have a clear conscience toward God and men.

Because of this, I always try to maintain a clear conscience before God and all people.

For this reason also I myself always do my best to have a clear conscience toward God and people.

And herein do I exercise myself, to have always a conscience void of offence toward God, and toward men.

Public Domain