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One who "lives" in sin possibly was never saved in the first place. For one who is born again, continual sin disrupts his or her relationship with God the Father. His or her witness for Jesus (which one is called to do) is destroyed. Others take note of one who says "I am a Christian" and then behaves like the devil. Rest assured that God will not always strive with that individual (1 Corinthians 5:5). As to daily sins, we all slip into that. We lie, exaggerate, distort details, receive more in change at the local grocery than we are entitled to and walk out with it............ but we don't "live" in, abide in, continue in a lifestyle of sin. When we falter we MUST go to 1 John 1:9, confess what we have done. HE is faithful and just to forgive us! Our salvation was never in question, just our day-by-day fellowship with the One who loves us.
A christian can still fall into sin and stay there. In Corinthians there was a believer that was sleeping with his fathers wife. Paul said that this was such a great sin that he should be removed from the fellowship and turned over to satan that his body would be killed but his spirit would be saved in the day of the Lord. As believers no matter how far we go we are still sons whether of obedience or disobedience. Otherwise grace would not be grace. We can sure separate our selves from our fellowship with the father through sin, but not our relationship. One of the most beautiful storys in the bible is that of the prodical son. He was a son. We just cannot fathom Gods grace. That grace is what makes us love Him so much. You who say you have no sin, what about the sin of pride. If you say you have no pride you have are admitting that you do. Many of our sins are our attitude. Do we obey God and love others to make ourselves more righteous, or do we obey God and love others because we love God and others.One is selfrighteousness, and the other is righteousness. All have sinned and come short of the Glory of God. I thank God that all of my sins were nailed to that cross and washed away in His blood. I love Him because He first loved me. But, just remember, God does chasten those He loves. And that is not a pleasant experience. Don't ask me how I know.
The Bible makes it very clear that a person who is born again and wishes to remain or continue in Christ, does not live in sin! 1 John 3:24 We've all heard professing Christians say, "we're all sinners." You are what you practice. If you are practicing sin, then you are indeed a sinner and are in need of a a Saviour. 1 John 3:8 says, that the person who practices sin, is of the devil. 1 John 3:7 says, that the person who practices righteousness, is righteous! Mat. 1:21 says, that Jesus came to save His people from their sins, not in their sins! If a person claims to be born again and is practicing sin, then that person is trusting some man's opinion or some theological system for his salvation, but certainly not Jesus! 1 John 3:9 says, that whoever is born of God doesn't practice sin, and he can't practice sin, because he is born of God. "We know that whosoever is born of God sinneth not; but he that is begotten of God keepeth himself, and that wicked one toucheth him not." 1 John 5:18
In today’s pluralistic and tolerant society, people hesitate to make moral judgments. Doing so is not politically correct, we are told. The greatest sin seems to be to judge another person’s actions. Thus, the thinking goes: ‘What you believe might work fine for you, but you really should not try to impose your thinking on anyone else. These days, people organize their life according to differing sets of values. No one has a monopoly on moral truth. Other people’s values are just as valid as yours.’ This kind of reasoning has brought about a change in people’s vocabulary. The word “sin” is now rarely used in serious contexts. For many, it has become a topic for jokes. People are no longer said to “live in sin”; they just “live together.” They are no longer “adulterers”; they are “having an affair.” They are no longer “homosexuals”; they prefer “an alternative lifestyle.” There is no doubt that what people are prepared to accept as “normal” or condemn as “sin” has changed. But have courage and faith because our great God Jehovah has provided a means to eliminate sin. JEHOVAH’S greatest act of love was that of sending his only-begotten Son to offer his perfect human life as a ransom. As sinful humans, we sorely need such deliverance, since no imperfect man “can by any means redeem even a brother, nor give to God a ransom for him . . . that he should still live forever.” (Psalm 49:6-9) How grateful we are that God “gave his only-begotten Son, in order that everyone exercising faith in him might not be destroyed but have everlasting life”!—John 3:16. How does the ransom provide deliverance? Let us consider four ways in which we gain freedom as a result of this monumental act of love on the part of Jehovah God. Release by Ransom First, Jesus’ sacrifice can deliver us from inherited sin. All of us are born in sin. Yes, we are sinful even before we are able to violate Jehovah’s law. How so? Romans 5:12 says: “Through one man [Adam] sin entered into the world and death through sin.” As children of sinful Adam, we have inherited his imperfect condition. However, the payment of the ransom makes it possible for us to be freed from the grip of inherited sin. (Romans 5:16) Jesus ‘tasted death for every man,’ bearing the consequences of sin for Adam’s offspring.—Hebrews 2:9; 2 Corinthians 5:21; 1 Peter 2:24. Second, the ransom can liberate us from the fatal effects of sin. “The wages sin pays is death.” (Romans 6:23) The penalty for sin is death. By means of his sacrificial death, the Son of God made eternal life possible for obedient mankind. Indeed, “he that exercises faith in the Son has everlasting life; he that disobeys the Son will not see life.”—John 3:36. Notice that we can be delivered from the effects of sin only if we exercise faith in God’s Son. This involves making changes in our life and bringing it into harmony with God’s will. We must reject any wrong course that we may have been pursuing and must take action to do what is pleasing to God. The apostle Peter said that we need to ‘repent and turn around so as to get our sins blotted out.’—Acts 3:19. Third, the sacrifice Jesus offered frees us from a guilty conscience. All who make a dedication to Jehovah and become baptized disciples of his Son experience comfort. (Matthew 11:28-30) In spite of our imperfection, we find deep joy in serving God with a clean conscience. (1 Timothy 3:9; 1 Peter 3:21) By confessing our sins and leaving them, we are shown mercy and gain relief from a troubled conscience.—Proverbs 28:13.
We all live in sin on a daily basis. That is why Jesus came. We could not live up to God's standard. We all practice sin whatever the degree of sin. God knows the heart of each sinner whether it is a saved or unsaved heart, He gives up on each sinner according to his will taking into the will of the sinner. A sin is a sin but murder is worse than drunkenness. God takes that into account.
I suggest reading Romans 7 and 8. :) they are not easy passages to understand however. I agree with Don Watson. When we were in the flesh we did what we didn't want to and didn't do what we knew we should. But chapter 8 speaks of the one who walks in the spirit. Galatians 5:16-18 KJV  This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.  For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.  But if ye be led of the Spirit, ye are not under the law. Then the Scripture goes through the works of the flesh drunkenness and the fruits of the Spirit... Then Galatians 5:24-25 KJV  And they that are Christ's have crucified the flesh with the affections and lusts.  If we live in the Spirit, let us also walk in the Spirit.
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