Does the author of the book of Hebrews, equate sin and unbelief and are they synonymous?

As we have shown before in many articles on this blog. Jesus and his first century followers redefined the phrase word of God, and used a solely redemptive hermeneutic that saw Jesus as the fulfillment, and purpose of all the scripture. This makes progressive revelation very important. Progressive revelation means that the Spirit gave more and more specific details about prophecy as prophetic events unfolded and that the revelation that came later must temper our view of previous revelation. Along with this, it likewise makes sense that the Spirit would speak with in the cultural development of people. This makes looking at what the New Testament writers wrote very important in determining what the exact meaning of passages, phrases and words was. One cannot take the previous revelation at face value.

It is obvious when one reads Hebrews 3 & 4 that the writer equates sin and unbelief. In fact, I think that it is safe to say that when one looks at the term sin, missing the mark, that the first definition one should use is unbelief. The original sin in Genesis was a sin of unbelief. Adam and Eve believed Satan who had contradicted God instead of believing God, so the sin, that entered into the world (Romans 5:12) was unbelief. So let's look at a different and perhaps more correct way to write Romans 5:12...

"Rom 5:12-14 Therefore, just as unbelief entered the world through one man, and death through unbelief, in this way death spread to all men, because all did not believe. (13) In fact, unbelief was in the world before the law, but unbelief is not charged to a person's account when there is no law. (14) Nevertheless, death reigned from Adam to Moses, even over those who did not disbelieve in the likeness of Adam's transgression. He is a prototype of the Coming One."

This is precisely why Romans 6:17 mentions obeying from the heart. Obeying from the heart is believing the gospel message plain and simply, and it is what puts one in right standing with God. The actions that current evangelical dogma calls sin is merely a symptom of unbelief. Here is where an entire fellowship, believing the gospel, and that grace is the driving force will reinforce an atmosphere of rest that will promote love, and supernaturally transform individuals. Getting this concept right... that in the New Covenant sin and unbelief are synonymous... is very important in setting that proper atmosphere.

So let's get back to Hebrews and the use of sin, disobedience, and unbelief. When you read Hebrews 3:17 - 19 it becomes glaringly obvious that the writer interchanges sin, unbelief and disobedience. This is a concept that one needs to bring back to the entire scripture. The proof in the pudding so to speak is Hebrews 10:26-27....

Heb 10:26-27 For if we deliberately (disbelieve, sin, disobey) after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, (27) but a terrifying expectation of judgment and the fury of a fire about to consume the adversaries.

The above passage receives the clarity that the writer of Hebrews intended. There has been so much made of this verse, but the reality is simple. If we willfully disbelieve after hearing the truth. There is not other sacrifice for sin.  The preponderance of the evidence mounts for a drastic paradigm shift from evangelical dogma.