The only scripture we have thats truly clear about losing salvation and thats blasphemy against the Spirit.
Blasphemy against the Holy Spirit is not about losing salvation. The "blasphemy against the Spirit" is mentioned in Mark 3:22-30 and Matthew 12:22-32. The term blasphemy may be generally defined as "defiant irreverence." *This case of blasphemy is a specific one, called "the blasphemy against the Holy Spirit" in Matthew 12:31. In Matthew 12:31-32, the Pharisees, having witnessed irrefutable proof that Jesus was working miracles in the power of the Holy Spirit, claimed instead that the Lord was possessed by the demon "Beelzebub" (Matthew 12:24). *Now notice that in Mark 3:30 Jesus is very specific about what they did to commit "blasphemy against the Holy Spirit." These Pharisees did not lose their salvation. They were obviously not saved to begin with to commit such a sin.
Jesus Christ is not on earth—He is seated at the right hand of God. No one can witness Jesus Christ performing a miracle and then attribute that power to Satan instead of the Spirit. The sin that is unpardonable for us is the state of continued unbelief.
The other is Hebrews 6:4 either in sense that if the person stays in rebellion then of course its impossible.
Or once getting to this point then its impossible spiritually.
Scholars cant agree if this verse is speaking from impossible to human effort to bring back someone in rebellion or God because the child denies his grace.
I've heard three different interpretations for Hebrews 6:4-6 (hypothetical view, lost salvation view, never truly saved view) but am not convinced that it teaches a really "saved" person really "lost their salvation." NOWHERE does the Bible use the words "lost salvation." According to the hypothetical interpretation, the key word in the passage is IF (verse 6). The writer of Hebrews is setting up a hypothetical statement: "IF a Christian were to fall away.. " The point being made is that it would be impossible (IF a Christian falls away) to renew them again to repentance. That’s because Christ died once for sin and if His sacrifice is insufficient, then there’s no hope at all. The passage, therefore, presents an argument based on a false premise (that a true Christian can fall away) and follows it to its senseless conclusion (that Jesus would have to be sacrificed again and again). The absurdity of the conclusion points up the impossibility of the original assumption.
once enlightened - The word enlightened means to bring to light, to shed light upon or to cause light to shine upon some object, in the sense of illuminating it. Figuratively, photizo means to give guidance or understanding, to make clear or to cause something to be known by revealing clearly. John 1:9 describes Jesus, the "true Light," giving light "to every man"; but this cannot mean the light of salvation, because not every man is saved. This light either leads to the complete acceptance of Jesus Christ or produces condemnation in those who reject such light.
partakers of the Holy Spirit - Partakers describes one who shares with someone else as an associate in an enterprise or undertaking. It speaks of those who are participators in something. Business partner, companion. Participating in. Accomplice in. Comrade. Metochos is used elsewhere in Hebrews in the context of believers (Hebrews 3:14 - "For we have become partakers of Christ") and thus the statement that the readers have been made partakers of the Holy Spirit seems at first glance to be support that true believers are being addressed, yet there are other ministries of the Holy Spirit that precede the indwelling of believers. It is very plausible to envision an individual becoming a sharer in or partaker of the Spirit (and his pre-salvation ministry - convicting of sin, righteousness and judgment to come) by responding for a time to His drawing power intended to lead sinners to Christ. The translation "shared" implies something done in company with others and before salvation all believers shared in the convicting ministry of the Spirit Who drew them to salvation. Note also that the writer does not state that these individuals were "indwelt by the Holy Spirit" or "sealed by the Holy Spirit" or "possessors of the Spirit's pledge (guarantee) of future inheritance."
tasted the good word of God - They had tasted in such a way as to give them a distinct impression of its character and quality, yet they still turned away. Inherent in the idea of tasting is the fact that one might or might not decide to accept the thing that is tasted. For example, the same Greek word (geuomai) is used in Matthew 27:34 to say that those crucifying Jesus "offered him wine to drink, mingled with gall; but when he tasted it, he
would not drink it." Do we taste into one Spirit or
drink into one Spirit? (1 Corinthians 12:13).
fall away - I find it interesting that the term "fall away" or "stumble" was used by the Lord Jesus of His 11 disciples at the time of His arrest. The disciples deserted Jesus as was predicted and Peter obviously denied Jesus three times. They were said to "fall away." Matthew 26:31 - Then Jesus said to them, "You will all fall away because of Me this night, for it is written, 'I WILL STRIKE DOWN THE SHEPHERD, AND THE SHEEP OF THE FLOCK SHALL BE SCATTERED.' 32 "But after I have been raised, I will go ahead of you to Galilee." 33 But Peter said to Him, "Even though all may fall away because of You, I will never fall away." Obviously, this was not a loss of salvation. For a
righteous man may fall seven times AND rise again, But the wicked shall FALL by calamity. (Proverbs 24:16)
Hebrews 6:7,8 - For the earth which drinks in the rain that often comes upon it, and bears herbs useful for those by whom it is cultivated, receives blessing from God; but if it bears thorns and briars, it is rejected and near to being cursed, whose end is to be burned. In this agricultural metaphor, those who receive final judgment are compared to land that bears no vegetation or useful fruit, but rather bears thorns and thistles. When we recall the other metaphors in Scripture where good fruit is a sign of true spiritual life and fruitfulness is a sign of false believers (for example - Matthew 3:8-10; 7:15-20; 12:33-35), we already have an indication that the author is speaking of people whose most trustworthy evidence of their spiritual condition (the fruit they bear) is negative, suggesting that the author is talking about people who are not genuine Christians. Verse 9 sums it up for me. The writer is speaking to those truly saved (calls them BELOVED). He says that even though he speaks like this concerning
THOSE types of people, He is convinced of better things concerning
YOU. Things that
ACCOMPANY SALVATION. Thorns and briars and permanently falling away do not accompany salvation.
It is generally stated by those who believe salvation can be lost that you can get it back again. If the writer of Hebrews was truly teaching that a really "saved," person really "lost their salvation" then why didn't he simply say, "For it is impossible for those who were once born again or saved, if they fall away, to renew them again to salvation? Why is it that we never find the words "lost or lose your salvation" in the Bible? *That would certainly settle the issue.