The bible tells us to kill sin. Romans 8:13 says, "For if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live." In other words,
"If ye do not kill sin, it will kill you."
As believers, we cannot lose our place in heaven due to sin, because Jesus took them unto Himself, but we lose our rewards. 1 Corinthians 3:15 says, "If anyone’s work is burned up, he will suffer loss, though he himself will be saved, but only as through fire."
Due to the nature of sin, I like to say 'one sin feels lonely.' In his book "Surviving in an Angry World", Charles Stanley writes about anger's link to other emotions. He takes the one sin of anger, and shows how it has a way with linking to other emotions, which become actions. He wrote for example, anger + hatred = rage. Yet the bible says be angry and do not sin, not letting the sun go down on your anger. (Ephesians 4:26-27). The reason is that this gives the devil a foothold. Another example is anger + resentment = retribution. Yet the bible says 'vengeance is Mine sayeth the LORD. '(Romans 12:9).
Sin is a snare that captures evildoers (Proverbs 29:6). It can happen before you know it. Jesus said that anger in your heart is like murdering in fact, both are sins. What He was saying is that sins begin in the heart, then land on the mouth and once a person gives voice to it, it becomes action. In Good News Club we always used to say that we hope the Lord will be pleased with everything we "think, say, and do." Because that is the progression of sweet aromatic actions that please the Lord, and that is the same trajectory of sinful actions that displease the Lord.
Let's say a man is daydreaming salacious thoughts about a female co-worker. His wife sees his pleased, daydreamy look and says, "What are you thinking about?" The man of course can't say "Another woman" so he says "My golf score last week." So he adds lying to lust and two sins are born. Then let's say he does not stop those thoughts and they turn to action. He says to his wife that he is running to the store for milk, and he takes the long way so he can drive by her house. His wife says "What took you so long?" and he says that he stopped to chat with a friend he ran into. Now he has added collusion + deception to his cadre of the sins of lust and lying. They are piling up fast. The final stage is when he flirts with the woman, taking his thoughts and words to action. We have a messy pile of ugly sins now, and one sin doesn't feel lonely any more.
In the Garden, in Genesis 3, we see that disobedience was born and then right after, blame, shame, and arguing. It did not take long to open the door to a nasty pile of sins in Adam and Eve.
By the time you see a pattern of sin emerge in a person, you can bet that there are other sins alongside it. Like this iceberg.
The Lord gave us the Holy Spirit to help us kill sin. Would you rather deal with a mountain, or a molehill? Molehill of course. Nobody likes to climb Everest when you can simply step over an anthill. Or trap a little fox as opposed to shooting big bad wolf. (Song of Solomon 2:15). No pile of sins are too big for our gracious Lord to handle. He already forgave them at the cross. But please do not let them grow in you. The bigger the mountain of sins in you, the more people are hurt when your sin is finally revealed. Sin has effects on you and on those around you, too.
If you repent, the Spirit will help you in the Lord's power to resist the sinful inclinations of man. Pray to Him for help in repenting and resisting sin, as soon as it comes to mind.
And have no fellowship with the unfruitful works of darkness, but rather reprove them.
And always remember, it was an iceberg that sank the Titanic.