Jesus doesn’t permit us to settle for anything less than an all out victory over sin. Why? Because Jesus paid the total price to deliver us from every aspect of sin: sin’s penalty, sin’s power, sin’s presence (future). Romans 6:14 says, “For sin shall not have dominion over you: for you are not under the law but under grace.” Sin’s dominion, rule, power to dominate us has been broken by Jesus Christ. We are no longer obligated to yield to its’ desires or lusts. We are as free as a dead man is to any obligations. No, we cannot sin a little (once in awhile) because we know God will forgive us (Romans 6:15). Forgiveness is a grace, paid for by Jesus on the Cross, but He did not give us forgiveness so we can sin but rather if we do sin. Grace is not freedom to sin but freedom from sin. We also do not have ongoing forgiveness for ongoing sinning (habitual sinning) or so we can continue in sin, God forbid (Romans 6:1). If we acknowledge our sin and confess it we can receive the provision of His forgiveness 1 John 1:9.
Yielding to sin can open the door to more sin. Sin grows and is designed systematically to conquer you. It’d be easier to find a man who never committed a particular sin than to find a man who only committed it once. It starts small and grows. People who have repeatedly fallen into sin often come to believe that they are helpless in the war against it. They resign themselves to reduce the number of defeats that they experience; however, God commands us to fight sin (resist) wholeheartedly. “Awake unto righteousness and sin not … 1 Corinthian 15:34.” “Ye have not yet resisted unto blood, striving against sin Hebrews 12:4.” There is absolutely no trace of sin in the new creation spirit man (2 Corinthians 5:17) and we can walk by it.