Ok, i'm gonna try and see if I can help here. This mindset of Christians not sinning seems like your main problem. Your view on this is
totally wrong and is probably the reason why things don't add up in your mind. Jesus was and will be the only human that was without sin. non-Christians sin and Christians sin too! Yep, even the woman from the Church of God denomination you mentioned
. 1 John 1:8 -> "If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. 10 If we say that we have not sinned, we make Him a liar, and His word is not in us."
Read Romans 5:20 - the end of chapter 6. I will make reference to it while speaking now plus it will give you a deeper understanding of the sin issue and being saved. I pray that as you read those verses that the words are not just words to be scrutinized but life that penetrates your mind to your spirit, and I pray that God through His spirit gives you understanding of His ways in Jesus's name. Amen.
Ok, so no one can ever live up to the 10 commandments as a way of life. Only Jesus ever did. No one can ever live without sin as a lifestyle, only Jesus did. We are continually transformed to the image of Christ and this is a lifetime process. We will never attain perfection in this earth. The good news is God is not expecting perfection! He said YOU should come as you are. With your sin and your baggage and all of you. You can
never be not good enough to be a Christian. God made you and however you turn out is no surprise to Him. If you had kids, you know they're gonna grow and you know what to expect. You wouldn't not want your child anymore because they became a toddler and started being messing the place up or because they became a teenager and started rebelling and doing things against your will. You would rather have them broken and damaged than not at all, right? Basically, that you sin and all what not is no surprise to God. My Church has a sign up saying "No perfect people allowed"
. I guess it's to counteract this kind of mentality.
Where sin abounds, grace abounds even more. With non-Christians, i'd say sin is a verb - a doing thing, a lifestyle. With Christians, the spirit of God in us convicts us of sin and 'free's' us. This freedom means freedom from the bondage of sin and not from the ability to sin - we're no more slaves to sin, we have a choice and there is a constant battle between the flesh: Galatians 5: 16-17 "6But I say, walk and live [habitually] in the [Holy] Spirit [responsive to and controlled and guided by the Spirit]; then you will certainly not gratify the cravings and desires of the flesh (of human nature without God). 17For the desires of the flesh are opposed to the [Holy] Spirit, and the [desires of the] Spirit are opposed to the flesh (godless human nature); for these are antagonistic to each other [continually withstanding and in conflict with each other], so that you are not free but are prevented from doing what you desire to do." As you can imagine, this is not easy and we fall into sin.
The difference is as we are not slaves to sin, we have dominion over sin! We have God's grace. One of the devils biggest lies which he has obviously told you is that you are not good enough ... sinner like you. But the bible says in Romans 8: 1-3 that
there is no condemnation for those who believe. The bible encourages us to confess our sins to one another. When Jesus taught us how to pray in the Lord's prayer, He asked for forgiveness of sins. This is because we are not and can never ever be sin free as long as we are on this earth.
Hope this has helped at least a little to clarify things for you. Christianity is not about sin/no sin, rules and regulations, this and that. We can't impress God by our ability to be 'sinless' in our eyes, we please Him by faith. Christianity is all about love; loving God and loving people. Stop putting so much pressure on yourself, these things will come ... the Holy spirit will help you. Just focus on seeking God. He will accept your sinful self ... you're not any different from any of His children.