1 John 1:6-7; 1 John 2:6; 1 John 2:11

6 If we say that we have fellowship with him, and walk in darkness, we lie , and do not the truth: 7 But if we walk in the light, as he is in the light, we have fellowship one with another , and the blood of Jesus Christ his Son cleanseth us from all sin.
6 He that saith he abideth in him ought himself also so to walk , even as he walked .
11 But he that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth , because that darkness hath blinded his eyes.