Joel initials a study from the book of Hebrews, teaching through chapters 1 through 4.  Joel highlights how the unknown author of this book writes of the supremacy of Christ the new believers with  Hebrew.  Much like today, people can be accustomed to may past practices and teachings that need to be replaced with new found truths in Christ.  Such truths as, Christ is our high priest who sacrificed him self once and for all for our sins..