The Christian’s response to sin is to hate it, repent of it, and forsake it. We still struggle with sin, but by the power of the Holy Spirit who lives in us, we are able to resist and overcome sin. If a person actively, perpetually, and unrepentantly lives a sexual immoral lifestyle, the lifestyle of a thief, a greedy lifestyle, a drunken lifestyle, etc., it is not possible for such a person to be a Christian (follower of Christ), and such a person will definitely not enter the kingdom of God.
Read more "What does it mean that a person will not inherit the kingdom of God (1 Corinthians 6:9-11)?" http://www.gotquestions.org/not-inherit-kingdom-God.html