Read the Bible More Closely to Counter Fears of Losing Salvation
Living a life that is not characteristic of someone in the Kingdom of God means that that behavior is not of the Christian's nature. It does not mean that justified, born again Christians will take on the nature of those in the Kingdom of Satan by behaving that way! Salvation is by confession of the tenets of salvation (see 1 Corinthians 15:1-8) and calling on the name of Master Jesus by verbally confessing Master Jesus (see Romans 10:9a, 10:10b and 10:13). Sanctification comes progressively to the born again, justified Christian by believing the Resurrection and thinking on it and the Spirit Who raised Him from the dead (and all Christians, too) more and more.
When you read those scary passages that seem to say that a Christian who believes and confesses according to the Scriptures can lose their salvation or has never been saved, then look at it more carefully and ask yourself what the subject is and if it refers to the unsaved which it is comparing and contrasting the saved to. Consider 1 John 3:7. The righteousness of the worst, baby-raping, genocidal, puppy-kicking person who is justified by Christ has Christ's righteousness (but his evil works will be burned away like wood, hay and stubble when we Christians are judged by our Master, and we will lose something for it), and Christ's righteousness DOES exceed the righteousness of the Scribes and Pharisees who were without Christ and His justification.
When we saved are in the Kingdom of God, NONE of us WILL do those evil things - ever! Oh, happy day, when my body transforms into the image of our same Master and Savior Jesus The Messiah, because then we will be totally free from this deadly sin!