For God's word is alive and active and sharper than any double-edged sword. It penetrates [deep enough] even to divide [a person's] soul [from his] spirit, and his joints [from his] bone marrow [Note: This is figurative language describing the penetrating effect of God's word into a person's spiritual, inner being] and is able to judge the thoughts and intentions of a person's heart.

For certainly enough time has elapsed so that [by now] you ought to be teachers, [but instead] you are in need of having someone teach you again the basic principles of God's message. You have become people who need "milk" and not "solid food." [Note: The fundamental truths of Christianity are here figuratively spoken of as "milk," while the more advanced teaching, such as Christ's priesthood being like Melchizedek's, is called "solid food"].

And we will do so [i.e., go on to more advanced teaching] if God allows us to. For it is impossible to get people who have [completely] fallen away [from God] to repent again, because they [continue to] crucify for themselves God's Son all over again, and hold Him up to contempt.

But when Christ became the Head Priest of the good things that have come, He entered the greater and more complete Tabernacle, not made by hand, that is, not part of this creation [i.e., heaven, See 8:2].

how much more will the blood of Christ, who through the eternal Holy Spirit [or, His eternal Spirit] offered Himself without [moral] blemish to God, cleanse our consciences from deeds which lead to [spiritual] death to serve the living God?

And we should consider how we can stir up one another to love [more] and to perform good deeds.

We should not neglect our assembling together [as a church], as some people are in the habit of doing, but we should encourage one another [spiritually], and [do it] all the more [diligently] as you see the day [of judgment] coming closer.

How much more severely do you think a person deserves to be punished who has trampled on the Son of God and has regarded the blood of the [New] Agreement, with which he was set apart for God, an unholy thing and has insulted the Holy Spirit, through whom God's unearned favor is shown?

For you showed sympathy for those who were in prison and accepted it joyfully when your [own] possessions were taken away, [because] you knew that you yourselves had a better and more permanent possession [in heaven].

And what more shall I say? For time would fail me if I were to tell about Gideon, Barak, Samson, Jephthah, David, Samuel and [all] the prophets,

God's voice shook the earth at that time, but now He has promised, saying [Hag. 2:6], "I will cause not only the earth to shake once more, but also heaven [as well]."

Now the words, "once more" indicate the removing of what can be shaken --- that is, the created universe --- so that those things which cannot be shaken will remain. [Note: These "things" have been variously interpreted to be eternal truth, the heavenly kingdom, the new heavens and earth, etc.].