The context of Hebrews 10 is to those who are in covenant with Christ, sanctified believers who have departed from Christ and returned to Judaism.
This context actually begins in
Hebrews 3, and continues through to Chapter 10 where it culminates with these words...
But we are not of those who draw back to perdition,
but of those who believe to the saving of the soul.
Beware, brethren, lest there be in any of you an evil heart of unbelief in
departing from the living God; but exhort one another daily, while it is called “Today,” lest any of you be hardened through the deceitfulness of sin. For we have become partakers of Christ
if we hold the beginning of our confidence steadfast to the end, Hebrews 3:12-14
For it is impossible for those who were
once enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit, and have tasted the good word of God and the powers of the age to come, if they
fall away, to renew them again to repentance, since they crucify again for themselves the Son of God, and put Him to an open shame. Hebrews 6:4-6
For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries. Anyone who has rejected Moses’ law dies without mercy on the testimony of two or three witnesses. Of how much worse punishment, do you suppose, will he be thought worthy who has trampled the Son of God underfoot, counted the blood of the covenant by which he was sanctified a common thing, and insulted the Spirit of grace?
Hebrews 10:26-29
- there no longer remains a sacrifice for sins,
So when they sin, then
they no longer have a sacrifice for sins.
Because they have departed from Christ, they can no longer be brought to repentance and therefore no longer have a sacrifice for sins, having returned to unbelief.
JLB