Chiastic Structure of Hebrews

I continue to be amazed at the structure of the book of Hebrews.  The author surely knew how to communicate to a Jewish audience.  Jews would often employ the literary device called chiasm.  A chiasm is where you place ideas in parallel so as to put the main thought in the center.  For instance...

A
        B
                C
        B'
A'

A      Whoever sheds
            B     the blood
                        C     of man by man
            B'    his blood
A'     shall be shed    

I've already posted on the chiastic structure of the entire book.  Here is a look at a couple other passages from the book of Hebrews involving chiasm.

1. Hebrews 3:7-19
2. Hebrews 4:1-11
3. Hebrews 5:1-10
4. Hebrews 7:20-28
   
5. Hebrews 8:1-6
   
6. Hebrews 9:1-15