1 St John 1:5-7

And this is the declaration which we have heard from him, and declare unto you: That God is light, and in him there is no darkness. If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth. But if we walk in the light, as he also is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.