Before sin entered to infect humans, we had a relationship with God and daily walked and talked with Him.  Upon being tainted by it, we hid from Him; Gen 3.   Adam and Eve were the representation of each one of us, and so now all experience the contamination of sin.  When we actively walk in sin, we are ashamed before God.  We may not feel ashamed, but will most certainly want to hide from the truth and the things of God.  We get angry when it is called out in us and are indignant and will justify our  (sinful) behavior.  Those who are not willing to be confronted see sin as relative as having certain variables that would determine its reason to be allowed in our lives; thus, we make excuses and nullify it as sin and the reason for our anger.  The argument is not between you or me in our definition of sin or that it exists or does not exist or even if we actively practice sinful lives.  There is no argument if we see through the context of what the Bible says about it.  It is simple really, as John explains it for us plainly;

Whoever commits sin also commits lawlessness, and sin is lawlessness. 1 John 3:4

Sin is the outworking of lawlessness.  When we are not obeying the Law of God, we will commit this offense.  What?  We are not under the Law but under grace!  Thankfully so!  Since we are under grace through Jesus Christ, we are not SUBJECT to the Law’s conviction, but this does not mean we now can walk in lawlessness – according to what defines sin.  The Law of God is not nullified because we are not subject to its condemnation – and this is the grave error many have taken up.  The commands of God still remain for us to uphold and, in fact, are written upon our hearts; Heb 8:10. What has significantly changed is that Jesus Christ has broken the power of sin, so it no longer can keep us in bondage to it. And all who call on the name of the Lord may be saved from its hold – and wrath that is to come for it. 

This means that when anyone CONTINUES to practice sin, are not walking in faith and in the Spirit but according to the old nature and its fleshly lusts that Christ has crucified –and so remain in bondage and condemnation and power of sin; Romans 8 –

For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit, the things of the Spirit.  For to be carnally minded is death, but to be spiritually minded is life and peace. Because the carnal mind is enmity against God; for it is not subject to the Law of God, nor indeed can be.  So then, those who are in the flesh cannot please God.  Romans 8:5-8.

How many who say they love the Lord and believe to be in good standing with God are those who walk in this way?  Too many.  Why is this so?  Because sin is deceitful and will blind us from seeing and knowing the truth.  Sin causes us to hide from the truth; Heb 3: 12-14.  The Law exposes sin, and the commands of God teach us how we are to deal with sin and live in a relationship with Him through His Son; John 15:10. When we walk in the faith we profess to have, we will turn from no longer pleasing our flesh, and will take on the sufferings of Christ (Romans 8: 16-17), which is to deny ourselves, as He did, and to take up our cross daily, as He did; Luke 9:23, and walking in the Light of righteousness and truth through His resurrection power and grace – receiving His glorious cleansing; 1 John 1:5-7.

Since we believe in Jesus Christ and receive Him in our lives, we are free from being one who would walk in sin to be subject to it, and choose daily to not allow it to have a place in us.    To say that ‘I can NOT stop myself from practicing sin’ is not understanding what Christ has done for us.  Sin is hated by God, and He will not excuse it even when we claim we are saved and under the blood of the Lord Jesus Christ, perhaps even more so – when we choose to continue to practice it.  There is a difference between committing a sin or even stumbling in it, to making it our daily practice.  If we do not have the desire to weed it out of our lives, we are misled and walk dangerously in being those who Jesus rebuked and was too late to do anything about it:

Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’ And then I will declare to them, ‘I never knew you;depart from Me, you who practice lawlessness!’ Matt 7:22-23