Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.
keeping a clear conscience, so that those who speak maliciously against your good behavior in Christ may be ashamed of their slander.
συνείδησιν ἔχοντες ἀγαθήν, ἵνα, ἐν ᾧ καταλαλοῦσιν ὑμῶν ὡς κακοποιῶν, καταισχυνθῶσιν οἱ ἐπηρεάζοντες ὑμῶν τὴν ἀγαθὴν ἐν Χριστῷ ἀναστροφήν.
syneidēsin echontes agathēn, ina, en ō katalaloysin ymōn ōs kakopoiōn, kataischynthōsin oi epēreazontes ymōn tēn agathēn en Christō anastrophēn.