As I said, I do not believe all sin leads to spiritual death because 1 John 5:16-17 says that this is so. Seeing 1 Peter 3:21 clearly says that baptism is not for salvation and that there are hidden or secret faults (Psalms 19:12), I do not believe we will be condemned for such minor transgressions. For things in regards to character flaws like not cutting the lawn yesterday when it was a little high or breaking the law in Port Authur, Texas that says, "Obnoxious odors may not be emitted while in an elevator" are not sins that lead unto the Lake of Fire. Surely God is not going to condemn folks for violating minor laws of the land like this (even if they are aware of them) and or if they are not being 100% perfect in the upkeep of their own home. Yes, we are to strive to be perfect in all we do. Jesus tells us to be perfect. I believe we can only do this by God's power. So a believer will seek out to obey in even the most minor things in time. But are minor transgressions (that are not specifically stated in the Bible) salvation issues? If that was the case, then nobody would be saved.
For 1 Corinthians 3 talks about works that were made out gold, hay, and stubble. Some of these lesser works will be burned up but they are still saved. Granted, this is talking about good deeds and not sin, but the point here is that even certain works done for God are not considered truly righteous and good enough to survive the fire.
I believe serious sin like murder, hate, lying, adultery, idolatry, theft, drunkenness, sexual immorality, sexual thoughts, etc. are all sins that lead unto the Second Death for any person if they are not repented of.
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