Hebrews 10, is contrasting the multiple animal sacrifices, which could not purge the conscience of sins, with the one, single, and permanent sacrifice of Christ Jesus, which can cleanse the heart from sin, going back and forth from the example to the reality:
Mulltiple animal sacrifices, cannot "take away sins":
Hebrew 10:1 KJB - For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
Hebrews 10:3 KJB - But in those sacrifices there is a remembrance again made of sins every year.
Hebrews 10:4 KJB - For it is not possible that the blood of bulls and of goats should take away sins.
Hebrews 10:6 KJB - In burnt offerings and sacrifices for sin thou hast had no pleasure.
Hebrews 10:8 KJB - Above when he said, Sacrifice and offering and burnt offerings and offering for sin thou wouldest not, neither hadst pleasure therein; which are offered by the law;
Hebrews 10:11 KJB - And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins:
But there was an infinitely greater sacrifice provided in the body of Jesus Christ:
Hebrews 10:5 KJB - Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me:
Hebrews 10:7 KJB - Then said I, Lo, I come (in the volume of the book it is written of me,) to do thy will, O God.
Hebrews 10:9 KJB - Then said he, Lo, I come to do thy will, O God. He taketh away the first, that he may establish the second.
Hebrews 10:10 KJB - By the which will we are sanctified through the offering of the body of Jesus Christ once for all.
Hebrews 10:12 KJB - But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God;
Hebrews 10:13 KJB - From henceforth expecting till his enemies be made his footstool.
Thus, the summation to such a conclusion:
Hebrews 10:14 KJB - For by one offering he hath perfected for ever them that are sanctified.
being witnessed to tby the Holy Ghost:
Hebrews 10:15 KJB - Whereof the Holy Ghost also is a witness to us: for after that he had said before,
Hebrews 10:16 KJB - This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them;
Hebrews 10:17 KJB - And their sins and iniquities will I remember no more.
Hebrews 10:18 KJB - Now where remission of these is, there is no more offering for sin.
Yes, Jesus perfect and singular [one, once, etc], unrepeatable, sacrifice and His shed blood, is what we are sanctified through, which could not be done through the multiple animal sacrifices or their blood. Notice the New Covenant, in which the Law of God, the Ten Commandments, are to be written upon the Heart, citing Jeremiah 31:31-34, Ezekiel 36:25-28 KJB, etc.
"remission" is forgiveness of those sins which are "past":
Romans 3:25 KJB - Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
It does not give an automatic pass on sin committed beyond that point of justification. Forgiven sins may be uncovered, unforgiven, as Matthew 18, etc reveals, since they are not yet blotted out, until the end of the anti-typical Day of Atonement [Revelation 14:6-7; Acts 3:19 KJB]
Thus, since the "past" sins are forgiven, and remitted, we can have confidence in God, and there is no more continuing sacrifices [such as the animals] to be made, since that single one sacrifice was all that was needed:
Hebrews 10:18 KJB - Now where remission of these is, there is no more offering for sin.
Thus fulfills the prophecy of Daniel:
Daniel 9:27 KJB - And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
That Jesus did this, does not negate the necessity of obedience, to the Law which He magnified in His death:
Isaiah 42:21 KJB - The LORD is well pleased for his righteousness' sake; he will magnify the law, and make it honourable.
Hebrews 10:14 is no license to sin [being transgression of God's Law, the Ten Commandments, 1 John 3:4 KJB], which is the very antithesis of which Jesus came to do:
Hebrews 2:14 KJB - Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil;
1 John 3:8 KJB - He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
This is why Paul continues the thought in Hebrews 10, that even though we "are sanctified" "for ever" [that is continually, ongoing] through that one sacrifice [and need not multiple],
so long as we believe in that sacrifice provided and in its cleansing power, otherwise, we can become those that were ["was"] sanctified, and become so no longer, and be "rejected":
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?
God's grace is the power of God unto salvation, in Christ Jesus, to bring us back into atonement, harmony, with His will, His Law, the Ten Commandments.
Christ's single sacrifice, sets the Christian apart for holy purposes and deeds, which is what sanctified means. it is to be an eternal doing by the eternal believing.
There were some already in Pauls' day, drawing back, and not gathering together on the Lord's day, the Holy 7th day the Sabbath of the LORD thy God, and through their disbelief, like Israel of old, could not be Holy:
Hebrews 10:25 KJB - Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.
2 Peter 2:21 KJB - 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.
The Holy 7th Day the Sabbath of the LORD thy God, is the very sign and memorial of the perfect Creation, when there was no sin in mankind and Redemption from all sin/s. Jesus lay resting in the Tomb, having "finished" His work which He came to do on the earth. Enter therefore, into the rest with Him, on the Day He sanctified, for in so doing, it means you believe in the sacrifice given in Him, and understand God's Mercy and Justice, upholding His Law and providing the way out of condemnation for having transgressed it.
