1 John 1:4-9

and these things we write, that our joy may be made full. And this is the message which we have heard from him and announce unto you, that God is light, and in him is no darkness at all. If we say that we have fellowship with him and walk in the darkness, we lie, and do not the truth: but if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus his Son cleanseth us from all sin. If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and righteous to forgive us our sins, and to cleanse us from all unrighteousness.