The one who says he resides in God ought himself to walk just as Jesus walked.

If we say we have fellowship with him and yet keep on walking in the darkness, we are lying and not practicing the truth.

But if we walk in the light as he himself is in the light, we have fellowship with one another and the blood of Jesus his Son cleanses us from all sin.

But the one who hates his fellow Christian is in the darkness, walks in the darkness, and does not know where he is going, because the darkness has blinded his eyes.