1 John 1:6

Ἐὰν εἴπωμεν ὅτι κοινωνίαν ἔχομεν μετ' αὐτοῦ, καὶ ἐν τῷ σκότει περιπατῶμεν, ψευδόμεθα, καὶ οὐ ποιοῦμεν τὴν ἀλήθειαν·

Ean eipōmen oti koinōnian echomen met' aytoy, kai en tō skotei peripatōmen, pseydometha, kai oy poioymen tēn alētheian·

King James Version (KJV)

If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:

Modern English

If we claim to have fellowship with him and yet walk in the darkness, we lie and do not live out the truth.