Structure

Since we have authorization for free access to enter the sanctuary by the blood of Jesus, by the fresh and living way that he opened up for us, through the curtain—that is through his flesh,
let us draw near with a sincere heart in the assurance that faith brings,
because we have had our hearts sprinkled clean from a burdened conscience and our bodies washed in pure water.
And let us hold unwaveringly to the hope that we confess, for the one who made the promise is trustworthy.

The Beautiful, Balanced and Brilliant Structure to the Book of Hebrews — Heb pt.10

Who wrote Hebrews? Why and to whom?
The book is very carefully structured, and understanding this is an excellent doorway into seeing the main focus of the book, and how the author supports such a powerful central claim.