It is only difficult to explain this to you because you yourselves have not grown in your maturity in Christ and are in fact babies. Babies cannot understand the things of adults. (5:11-14). If you were mature it would be easy to explain to you.
We are told at 6:18 that it is impossible for God to lie. We have heard similar words before this, in the Old Testament, and from Paul (Numbers 23:19; 1 Samuel 15:29; Titus 1:2). At 6:20 he again mentions Christ being a high priest forever in the order of Melchizedek, and then in chapter seven begins to speak more about what this entails. The name Melchizedek means “King of Righteousness.” This man was also king of Salem (Jerusalem), meaning “peace” (Hebrew “shalom”). His genealogy is never mentioned and Paul says that he is without parents or even genealogy (7:3) but is made like a Son of God, which we already know Jesus is. We know Christ’s earthly genealogy and also that since He is the Son of God thereto He is “without genealogy.” The priest of God is to receive the tithe of the people. Abraham, the father of God’s people (OK, grandfather) paid a tithe to this Melchizedek so Paul says in a sense Levi who later received the tithes paid the tithe. Some believe that Melchizedek was more of a title than a name and that the man we know only as Melchizedek was actually Noah, who because of the flood was “without mother or father or genealogy.” If this is true it puts a quite different twist on the teaching. We are then reminded that Christ counts his genealogy through Judah, who was not of the priestly line of his brother Levi. The priests were many and lived and served only for a season. Christ is one and lives and serves forever.
At 8:1 Paul tells us that he has reached his main point. Speakers and writers do not often do this. We should pay careful attention to this point. This high priest reigns from heaven at the right hand of God the Father!
There will come a day says God (quotations here) when no one will have to teach anyone else about Me, for they will ALL know Me! (8:11; Jeremiah 31:34; Isaiah 54:13). This quotation from Jeremiah is from that passage we associate with “the new covenant,” but “when” does this take place? Is it past, present, or yet future for us? I think it is yet future and will happen before “THE END,” whenever that may be. My point is that I believe that we WILL fulfill the Great Commission and that things will eventually get better, not worse. There is much in the Old Testament prophets pointing to this.
At 9:8 he mentions that “the outer tabernacle is still standing” which means a date of writing prior to 70 AD, but it sounds as if he knows that one day soon (from then) the temple will be torn down “and not one stone be left upon another” (Matthew 24:2).
Proverbs: Verse 17 tell us that we need one another, in worship and other intellectual stimulations. God has given us to each other for the good of all. Silver and gold are tested by fire, but man is tested by the way he reacts to the praise that is given him. How do you come out of the testing? Even though you can grind grain and separate out the chaff, you cannot separate a fool from his foolishness. Keep close attention to your own business, you depend upon it.