In Hebrews chapter 12, what does the writer illumine as the joy set before jesus-- that enabled him to endure the treachery of the cross?

In Hebrews Chapter 10, what explanation is given for why animal sacrifices fell short of the heavenly sacrifice yet to come?

How does Hebrews chapter 9 help us understand Jesus as the High Priest of a "superior tabernacle not made with the hands" ?