1 John 1.7-2.1
 If we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.  If we claim to be without sin, we deceive ourselves and the truth is not in us.  If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.  If we claim we have not sinned, we make him out to be a liar and his word is not in us. [2.1] My dear children, I write this to you so that you will not sin. But if anybody does sin, we have an advocate with the Father – Jesus Christ, the Righteous One.  He is the atoning sacrifice for our sins.
The first step to becoming a Christian is to recognise my natural sinfulness and my need to be put right with God. Then I will find that living the Christian life is difficult, and that old sin, though dealt with on the cross of Jesus, will keep coming back. But if I admit my failures, and turn to God – not for eternal salvation, for that is assured to those who trust Christ, but for daily cleansing – then he will hear me and intercede for me. What does that mean? – he will say to the Father, ‘That poor weak believer has sinned yet again, but I shed my blood for him, so his sins are covered by my sacrifice.’
Amazing grace (how sweet the sound)
that saved a wretch like me!
I once was lost, but now am found,
was blind, but now I see.