[26] For if we sin wilfully after having the knowledge of the truth, there is now left no sacrifice for sins, [27] But a certain dreadful expectation of judgment, and the rage of a fire which shall consume the adversaries. [28] A man making void the law of Moses, dieth without any mercy under two or three witnesses: [29] How much more, do you think he deserveth worse punishments, who hath trodden under foot the Son of God, and hath esteemed the blood of the testament unclean, by which he was sanctified, and hath offered an affront to the Spirit of grace? [30] For we know him that hath said: Vengeance belongeth to me, and I will repay. And again: The Lord shall judge his people.
In Hebrews 10:26, To "sin willfully" in the Greek carries the idea of deliberate intention that is habitual, which stems from deliberately rejecting Christ. This is continuous, a matter of
practice. Now we don't walk along our daily life and accidentally fall into a pit called sin. We exercise our will but, the use of the participle clearly shows continuous, willful action. The
unrighteous practice sin (1 Corinthians 6:9-10; Galatians 5:19-21);
not the righteous, who are born of God (1 Corinthians 6:11; 1 John 3:9). *You need to properly harmonize scripture with scripture before reaching your conclusion on doctrine.*
If the word 'sanctified' in Hebrews 10:29 is used to describe saved people who lost their salvation as you obviously teach, then we have a
contradiction because the writer of Hebrews in verse 10 said, "sanctified through the offering of the body of Jesus Christ
once for all" (Hebrews 10:10) and in verse 14, we read,
"perfected for all time those who are sanctified." (Hebrews 10:14)
*NOWHERE in the context does it specifically say the person who "trampled under foot the Son of God, and has regarded as unclean the blood of the covenant" was "saved" and/or "lost their salvation." The reference to "the blood of the covenant that sanctified him" in verse 29 "on the surface" appears to be referring to a Christian, but this would overlook the fact that the word translated "sanctified" which is the verb form of the adjective "holy," which means "set apart," and doesn't necessarily refer to salvation.
*In 1 Corinthians 7:14, Paul uses it to specifically refer to non-Christians who are
"sanctified" or "set apart" by their believing spouse. (And by this Paul does not mean that the unbelieving spouse is saved because of the believing spouse). A non-Christian can be "set apart" from other non-Christians without experiencing salvation as Paul explained.
Strong's Concordance
hagiazó: to make holy, consecrate, sanctify
Original Word: ἁγιάζω
Part of Speech: Verb
Transliteration: hagiazó
Phonetic Spelling: (hag-ee-ad'-zo)
Definition: to make holy, consecrate, sanctify
Usage: I make holy,
treat as holy, set apart as holy, sanctify, hallow, purify. -
https://biblehub.com/greek/37.htm
So the word "sanctified" means to be "set apart." If you give the word "sanctified" a broad brushed definition of "saved," then you would have to say that the 7th day was saved (Genesis 2:3), the tabernacle was saved (Exodus 29:43), the Lord was saved (Leviticus 10:3), the Father saved the Son (John 10:36) and many other things which would not line up with scripture.
In verse 39, the writer of Hebrews sets up the C
ONTRAST that makes it clear to me that he was referring to unbelievers, not saved people: But
we are not of those who draw back to perdition, but
of those who believe to the saving of the soul. Those who
draw back to perdition do not believe to the saving of the soul and those who
believe to the saving of the soul do not draw back to perdition.
So after considering the
CONTEXT, it would seem most likely that "he was sanctified" should be understood in the sense of someone who had been "set apart" or identified as a participant in the Hebrew Christian community of believers, but then renounces his identification with those who are Hebrews believers, by rejecting the "knowledge of the truth" that he had received, and trampling under foot the work and the person of Christ himself, which gives evidence that his identification with the Hebrew community of believers was
superficial and that he was not a genuine believer.