1 John 1:5-7

And this is the announcement which we have heard from him, and which we announce to you: that God is light, and in him there is no darkness. If we claim that we have fellowship with him, and yet we walk in darkness, then we are lying and not telling the truth. But if we walk in the light, just as he also is in the light, then we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.