Keeping out the darkness of this world is a necessity if we, as Christians, plan on spending eternity with Jesus Christ. Not only that, but our light will never shine on this world if we are full of darkness. The easy way to keep out the darkness is to live a Christian lifestyle. Living a Christian lifestyle will cause darkness to flee.
Below is a list of over fifty carnal behaviors, that I have found in the Bible, that will never allow our light to shine to this world. Having said that though, there isn't one of them that we couldn't take to the altar of repentance, asking Jesus to forgive us.
Gossiping (2 Corinthians 12:20 NLT)
Slandering (2 Corinthians 12:20 NLT)
Quarreling (2 Corinthians 12:20 NLT)
Being prideful (Mark 7:22 NLT)
Being foolish (Mark 7:22 NLT)
Being deceitful (Mark 7:22 NLT)
Being greedy (Mark 7:22 NLT)
Being jealous (2 Corinthians 12:20 NLT)
Being envious (Galatians 5:21 NLT)
Being disorderly (2 Corinthians 12:20 NLT)
Being arrogant (2 Corinthians 12:20 NLT)
Being hostile (Galatians 5:20 NLT)
Participating in sorcery or witchcraft (Galatians 5:20 NLT)
Being selfish (2 Corinthians 12:20 NLT)
Having lustful desires (Mark 7:22 NLT)
Lying (Ephesians 4:25)
Hating (Romans 1:29 NLT)
Stealing (Ephesians 4:28)
Cheating (1 Corinthians 6:10 NLT)
Unloving (Romans 1:31 NKJV)
Being unmerciful (Romans 1:31 NKJV)
Betraying friends (2 Timothy 3:4 NLT)
Loving pleasures more than loving God (2 Timothy 3:4 NLT)
Being reckless (2 Timothy 3:4 NLT)
Unforgiving (Romans 1:31 NKJV)
Being unholy (2 Timothy 3:2 NKJV)
Being untrustworthy (Romans 1:31 NKJV)
Being unthankful (2 Timothy 3:2 NKJV)
Being insolent (Romans 1:30 ESV)
Not loving good (2 Timothy 3:3 ESV)
Being unrighteous (Romans 1:29)
Being a busybody (1 Peter 4:15)
Being bitter (Ephesians 4:31)
Being disobedient to parents (Romans 1:30 NKJV)
Wild partying (Galatians 5:21 NLT)
Being lovers of self (2 Timothy 3:2 NKJV)
Causing dissension ( Galatians 5:20 NLT)
Causing division (Galatians 5:20 NLT)
Lacking self-control (2 Timothy 3:3 NKJV)
Being drunk (Galatians 5:21)
Being cruel (2 Timothy 3:3 NLT)
Being sensuous (Galatians 5:19 ESV)
Having the appearance of godliness, but denying its power (2 Timothy 3:5)
Letting sun go down while being angry (Ephesians 4:26 NLT)
Men not loving their wives as Jesus loves His church (Ephesians 5:25)
Women not submitting to their husbands (Ephesians 5:24)
Watching sin (movies, television, pornography etc) to be entertained (Psalm 101:3)
Committing idolatry by worshiping and praising movie stars, performers or professional athletes (1 Corinthians 6:9)
Murmuring (1 Corinthians 10:10)
Murdering (Mark 7:21)
Inventing new ways to sin (Romans 1:30 NLT)
As we all know some of these sins are not only against Jesus Christ, the One and Only God, but against the law of the land which will exact a price for breaking these laws. Of course, that is a problem but not the real problem. As I said above, without repentance of these sins, we will not make it to heaven.