In the myriads of current biblical theologies, some have focused on whole Bible theologies whereas others have only focused on authorial biblical theologies (i.e., Pauline Theology, Petrine Theology, Johannine Theology, etc.). Ambrose of Milan, a Late 4th century Western Father, provides an intriguing word to the inter-relationship of authorial thought. Especially in modern Pauline theologies, how many incorporate Hebrews into the worldview of Pauline thought? Not many, if at all.
There are few Ancient Homilies on Hebrews. Origen has the earliest known homily, though non-extant. Current researchers are familiar with it because Eusebius mentions the homily in Ecclesiastical History. In our Modern/Post-Modern era, Hebrews 6:4–6 continues to provide exegetes and Bible readers trouble. The same was in early Christendom as well. Even the Ancient Homilies and comments on Hebrews 6:4–6 prove troubling to early interpreters.