1 John 1:6

6Ifἐὰνwe should sayεἴπωμενthatὅτιfellowshipκοινωνίανwe haveἔχομενwithμετ’Himαὐτοῦand yetκαὶinἐνtheτῷdarknessσκότειshould walkπεριπατῶμεν,we lieψευδόμεθαandκαὶnotοὐdo practiceποιοῦμενtheτὴνtruthἀλήθειαν·

If we should say that we have fellowship with Him and should walk in the darkness, we lie and do not practice the truth.