But that rebellion of Israel is typified in the book of Hebrews as a lack of faith. We're not saved by our lack of sin, we're saved by faith. As the Hebrews author put it,
Heb. 4:2 For indeed the gospel was preached to us as well as to them; but the word which they heard did not profit them, not being mixed with faith in those who heard it.
Here the author is specifically using Moses' generation as a type for individuals who have heard the gospel. I would make the case that the willful sin spoken of in hebrews is the rejection of Christ, not random willful sins. We commit willful sins everyday, and they are covered. But when God illuminate individuals to the truth about their sin and need for a Savior and they reject that, they blaspheme the Holy Spirit. That's the unpardonable sin.
Heb. 4:2 For indeed the gospel was preached to us as well as to them; but the word which they heard did not profit them, not being mixed with faith in those who heard it.
Here the author is specifically using Moses' generation as a type for individuals who have heard the gospel. I would make the case that the willful sin spoken of in hebrews is the rejection of Christ, not random willful sins. We commit willful sins everyday, and they are covered. But when God illuminate individuals to the truth about their sin and need for a Savior and they reject that, they blaspheme the Holy Spirit. That's the unpardonable sin.
Faith is inclusive of obedience because faith is simply a heart that trusts in and is therefore yielded to God.
That is why Abraham left his home and went out and why Noah built the Ark. They had faith. If they refused to do those things they would have lacked faith.
Faith = Faithfulness = Obedience.
It is also a misnomer to say "we are not saved by a lack of sin, we're saved by faith." Salvation involves being "saved FROM sin" and the means of this is by the "Spirit of life IN Jesus Christ" whereby we exist in a state of "not sinning unto death" and thus are "free from the law of sin and death" which is "you sin you die."
Jesus saves us from sinning, not merely from the condemnation wrought by our past sins. Jesus saves us from ongoing rebellion to God.
Ongoing rebellion to God is the context of Heb 10:26, it has NOTHING to do with rejecting Jesus. It has EVERYTHING to do with rejecting the CLEANSING wrought by Jesus.
This is how we approach God seeking a cleansing...
Heb 10:19 Having therefore, brethren, boldness to enter into the holiest by the blood of Jesus,
Heb 10:20 By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh;
Heb 10:21 And having an high priest over the house of God;
Heb 10:22 Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water.
1. By the blood.
2. In a new and living way (ie. inward purity having forsaken our sin, our iniquity has been purged through repentance)
2. With a true heart.
3. In full assurance of faith.
It is THEN that we are cleansed from an evil conscience and our past sins are washed away. Thus it is fulfilling what David wrote...
Psa 32:1 A Psalm of David, Maschil. Blessed is he whose transgression is forgiven, whose sin is covered.
Psa 32:2 Blessed is the man unto whom the LORD imputeth not iniquity, and in whose spirit there is no guile.
The result being a spirit with no guile (due to repentance) and the sins being forgiven (due to the mercy of God).
It is in this context that the warning is given...
Heb 10:26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
Heb 10:27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
Heb 10:28 He that despised Moses' law died without mercy under two or three witnesses:
There is no sacrifice for ongoing willful sin because the purpose of the sacrifice is to give us a fresh start where we abide in a right relationship with God. To turn back to sin is to treat the blood of Jesus with contempt and that is why anyone in that state can only expect judgement lest they repent (which may not even be possible).
You say this...
We commit willful sins everyday, and they are covered.
John wrote this...
1Jn 3:8 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.
1Jn 3:9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.
1Jn 3:10 In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.
If you commit willful sins everyday you are of the devil. The children of God are manifest that they do not sin.
Jesus came to save us FROM sin.
Jesus did not come to cover over ongoing wickedness.