Do you know what "trampling the Son of God underfoot" is? It is rejecting Christ's sacrifice through unbelief. (The very reason the Bible says the Jews were "cut off") Sining "willfully" is to turn from the truth of Christ once we've recieved knowledge of His sacrifice and the Gospel. This is not talking about making mistakes or messing up or failing in the flesh. (Even Paul wrote about his struggle with not doing the things he knew he should do, and doing what he knew he should not, and how he therefore did not understand himself). The flesh wars against the Spirit, that's the reality for all believers.)
There is no more sacrifice for sin for anyone who rejects Christ's sacrifice, because He is the only way to the Father. He alone is the Way, the Truth and the Life and no one comes to the Father but by Him.
There is no more condemnation for those in Christ Jesus, and He has promised never to leave us or forsake us. Rightly divide the word of truth. Don't just quote a few surrounding verses if you're going to accuse me of taking something out of context, quote the whole letter then, as it's meant to be read in it's entirely. (More importantly, take the entire counsel of God into account, through the other parts of His word).
I used to believe as you do, so I get it. I used to believe that my salvation actually had something to do with me. I used to believe that I was lost each and every time I sinned, that I had somehow been "unborn" again, cut off, rejected. This led me to start wondering how many times God was going to bother taking me back when I was surely going to sin again in the future. And then I started listening to/reading God's word, in context. Then I finally understood. My salvation is not about me and my behaving well enough to be saved, (Christ justifies the ungodly), my salvation is entirely in Christ's hands and He has not failed.
So, finally, I took my eyes off myself and looked to the cross and to Jesus Christ alone for my salvation. Finally I had peace.
I hope you can come to realize the same. (And just so you know, I do not justify sin) I am fully aware of how wretched I am without Christ. The point is that I also realize Jesus did not fail in what He came to accomplish, and He did not lie when He said He would be with us to the end of the age.
You also need to keep in mind that all the epistles are written to believers, already saved.
31 What shall we then say to these things? If God be for us, who can be against us?
32 He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?
33 Who shall lay any thing to the charge of God's elect? It is God that justifieth.
34 Who is he that condemneth? It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us.
35 Who shall separate us from the love of Christ? shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?
36 As it is written, For thy sake we are killed all the day long; we are accounted as sheep for the slaughter.
37 Nay, in all these things we are more than conquerors through him that loved us.
38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
39 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord. - Romans 8:31-39
The Scriptures you are quoting are wonderful for those who
ARE HIS, but not for those who still walk
in the flesh of their carnal nature.
Hebrews 10:26 For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries. 28 Anyone who has rejected Moses’ law dies without mercy on
the testimony of two or three witnesses. 29 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? 30 For we know Him who said, “Vengeance is Mine, I will repay,” says the Lord. And again, “The Lord will judge
His people.” 31 It is a fearful thing to fall into the hands of the living God.
Starting with Romans 7, "
21 I find then a law, that evil is present with me, the one who wills to do good. 22 For I delight in the law of God according to the inward man. 23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. 24
O wretched man that I am! Who will deliver me from this body of death? 25 I thank God—through Jesus Christ our Lord!
So then, with the mind I myself serve the law of God, but with
the flesh the law of sin."
Chapter 8
"There is therefore now no condemnation to those who are in Christ Jesus,
who do not walk according to the flesh, but according to the Spirit. 2 For the
law of the Spirit of life in Christ Jesus has made me free from the law of sin and death. 3 For what the law could not do in that it was weak through the flesh, God
did by sending His own Son in the likeness of sinful flesh, on account of sin: He condemned sin in the flesh, 4 that the righteous requirement of the law might be fulfilled in us who do not walk according to the flesh but according to the Spirit. 5 For those who live according to the flesh set their minds on the things of the flesh, but those
who live according to the Spirit, the things of the Spirit. 6
For to be carnally minded is death, but to be spiritually minded is life and peace. 7 Because the carnal mind
is enmity against God; for it is not subject to the law of God, nor indeed can be. 8 So then, those who are in the flesh cannot please God.
9
But you are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you. Now if anyone does not have the Spirit of Christ, he is not His.
6 If we say that we have fellowship with Him, and walk in darkness, we lie and do not practice the truth. 7 But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin. 1 John 1:6-7
I say then:
Walk in the Spirit, and you shall not fulfill the lust of the flesh. 17 For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another, so that you do not do the things that you wish. 18
But if you are led by the Spirit, you are not under the law.19 Now the
works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness, 20 idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies, 21 envy, murders, drunkenness, revelries, and the like; of which I tell you beforehand, just as I also told
you in time past,
that those who practice such things will not inherit the kingdom of God." Galatians 5:16-21
