What is genre of Hebrews?
Except for introduction, it is homiletic: constant comparisons of old
Temple vs Christ. He earned title to all grace and forgiveness once for
all -- yet God in His love of good order wants a means or title for
giving it out, for which Christ provided saying, "Do this in memory of
me" -- Under same external sign as on Holy Thursday, obedient will of
Christ is presented as title for giving out graces -- to receive, we
must be members of His and be like Him (syn Christo theme, as in answer
175).