Romans 6:22 But now that you have been set free from sin and have become slaves of God, the benefit you reap leads to holiness, and the result is eternal life.
The more that you are involved with sin the more that you struggle to keep focus on God and on things that He wants in your life; but the more you are able to leave that sin behind the more you will be able to focus on His ways.
He has given us the chance of turning our backs on sin because of what Jesus Christ has done for us. We are no longer trapped in those sinful ways but have been set free.
Yes we still live amongst sinners. Yes we are still tempted. Yes we still sin. But we have the choice of following Christ and His ways; and that sets us free!