³ We proclaim to you what we have seen and heard,^(A) so that you also may have fellowship with us. And our fellowship is with the Father and with his Son, Jesus Christ.^(B)

⁶ If we claim to have fellowship with him and yet walk in the darkness,^(A) we lie and do not live out the truth.^{(B) 7} But if we walk in the light,^(C) as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all^[a] sin.^(D)