OSASer's always ignore context:
Hebrews 10:29 KJB - 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?
Eternal IN-securists ignore the greater context. If the word 'sanctified' in Hebrews 10:29 is used to describe saved people who lost their salvation as eternal IN-securists 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) So in Hebrews 10:10, we clearly read
..WE have been sanctified through the offering of the body of Jesus Christ once for all. In Hebrews 10:14, we read - For by one offering
He has perfected for all time THOSE who are sanctified. To go from sanctified back to un-sanctified would be in
contradiction here.
*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 overlooks the fact that the word translated "sanctified" (which is the verb form of the adjective "holy") which means "set apart," and doesn't always necessarily refer to salvation.
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.
*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 they are saved). A non-Christian can be "set apart" from other non-Christians without experiencing salvation as Paul explained. So the word "sanctified" means to be "set apart." If the word "sanctified" simply meant saved, then you would have to say that the seventh day was saved (Genesis 2:3), the tabernacle was saved (Exodus 29:43), Moses saved the people after coming down off the mountain (Exodus 19:14), the priests and the Levites saved themselves (1 Chronicles 15:14), the Father saved the Son (John 10:36), the Son saved Himself (John 17:19) and many other things that do not line up with scripture.
In verse 39, the writer of Hebrews sets up the CONTRAST that makes it clear to me that he was referring to make believers/nominal Christians, 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.