I do NOT believe when a Christian committed a sin, then lose salvation immediately. I believe when a Christian turn astray or backslide slowly in a process for a long term, while remain in dark or sins for a long time without confess or repent to Christ. By the time, a Christian dies(physical), who remain in dark without confess or repent, will be lost(spiritually). In James 1:14-16 tells us, when a Christian carries sins, and trap with sins, it shall bring forth to death(spiritual), unless, a Christian repents before too late at death(physical).
Luke 15:11-32 tells us about the lost son, he was with his father at the first estate(place). When sons decides turn away from his father. It takes process for a son to become lost before finally to repent and return back to his father. Otherwise, if suppose, a son remains in dark without repentance, he is remain LOST, period.
Bible teaches us, we must walk in the light daily, or if we walk continue in the dark, then, we shall be lost. That means, if we turn away from the Lord for a long time, without repentance by the time we die(physical), then we would be lost(spiritual)- period. Christ spoken of this parable is a matter of salvation.
Yes, a Christian could lose salvation, if turn away from the Lord for a long time, never repent back to the Lord at death(physical), then always be lost beyond Christian's death.
Luke 15:11-32 is very clearly teaching against unconditional security salvation doctrine.
While son is backslidding, his father still love his son. He never give up his love on his son, he is long-suffering(patience with mercy) for him. When his son finally repent return back to his father. Then, his father immediately forgived him. Father is the type of Jesus Christ.
Same with 2 Peter 3:9 says, "The Lord is not slack concerning his promise, as some men coun slackness; but is long-suffering toward us-ward, not willing that any should perish, but that all should come to repentance."
God's will that He doesn't want all people go to hell. He wants all people come to repentance for salvation. This is God's love toward all people. Understand, God cannot force all people to repent, people have their choice to make decision, want to remain in dark, or turn around to light and to follow Christ.
Luke 15:11-32 clears teaching us that, we all have freewill to make choice, we can turn away from the Lord, if we can. God cannot force us to do. God allows us to make decision. God desires all people to repentance of sins, and to follow God, so, shall have eternal life.
Sad, most people choice dark rather than light, that why they are on the way to hell than heaven.
Bible clears teaching us that a Christian could lose salvation, if remain in dark for a long time till death without repentance.
In Christ
Rev. 22:20 -Amen!