the letter’s structure, such as announcement of the subject (e.g., “angels” in 1:4 introduces the subsequent verses), framing devices (inclusio) which set the boundaries for a section, hook words (such as Melchizedek in 6:20 and 7:1), characteristic terms, shifts in literary genre (from exposition to exhortation), and chiasms (cf. the commentary on 5:1–10). Guthrie’s work on the structure seems to have been the most convincing to scholars.50 In any case, both literary features and content should