‘A fellow believer asked me through Facebook these questions relating to “Once Saved Always Saved” vs. “Conditional Security.
1. ” At what point do you lose it [salvation], how many sins do you have to commit exactly?”
The Biblical principle is this: wrath for the impenitent and mercy for the repentant. “But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God” (Rom. 2:5). “Repent therefore of this thy wickedness, and pray God, if perhaps the thought of thine heart may be forgiven thee” (Acts 8:22). “He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy” (Pro. 28:13)
Paul was explicit in telling the churches, “Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived” (1 Cor. 6:9). He then went on to list certain types of sinners, like fornicators, adulterers, etc. He wasn’t warning unbelievers of these things, but believers. If a believer becomes a fornicator or an adulterer, they will not inherit the kingdom of God unless they repent of their unrighteousness and become righteous again by faith in Christ.
2. ” If we are sealed by the Spirit unto the day of redemption, how can we become unsealed and where does it say that in scripture.”
“But when we are judged, we are chastened of the Lord, that we should not be condemned with the world” (1 Cor. 11:32). If we do not repent and heed the chastening of the Lord, the implication is that we will be condemned
Notice the conditions mentioned in this verse: “There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit” (Rom. 8:1). The condition of not having any condemnation is that you walk after the Spirit and not after the flesh. If you walk after the flesh, you are condemned. This is what Paul warned believers in the same chapter, “For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live” (Rom. 8:13)
This explains why Paul said, “But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway” (1 Cor. 9:27).
The primary texted that convinced me of the believers conditional security, or of the possibility of losing your salvation, is Hebrews 10:26-31
“For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries. He that despised Moses’ law died without mercy under two or three witnesses: Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace? For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people. It is a fearful thing to fall into the hands of the living God.
Notice the author said “if we,” so he included himself. It speaks of someone who “received” the knowledge of the truth, not merely heard it. The word “received” in that passage means to take, to claim, to procure, to choose, etc. It is the same Greek word found in this passage, “But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name” (John 1:12). Notice also this passage speaks of one who “was sanctified” by the blood of Christ but now tramples it underfoot by sinning.
So Hebrews 10:26-31 is saying if a saved believer willfully sins, trampling the blood of Christ which had sanctified them underfoot, they will face “sorer punishment” than those who merely sinned against the law, and have the “judgement and fiery indignation” of God to look forward to. The damnation of a “sinning Christian” (a backslider) who sins against the Gospel that saved him is worse than the damnation of a sinning heathen or pagan who merely sinned against the law
“For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them” (2 Peter 2:21)’
source: Jesse Morrell (biblicaltruthresources).