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@The Rogue Tomato I did some research just for you on Hebrews
Early Church Views
Pauline Authorship:
Some early Christian traditions and Church Fathers, including Clement of Alexandria and Origen, attributed the book to the Apostle Paul. However, Origen himself expressed uncertainty, famously stating, "Who wrote the Epistle, God only knows certainly."
Other Early Theories:
Barnabas: Tertullian suggested that Barnabas, a companion of Paul, might be the author.
Luke: Some early scholars proposed Luke, the author of the Gospel of Luke and Acts, due to similarities in style.
Clement of Rome: A few early suggestions also pointed to Clement of Rome.
Modern Scholarship
Language and Style:
The Greek used in Hebrews is more polished and sophisticated than that typically attributed to Paul. Additionally, the style and vocabulary differ significantly from Paul's known letters.
Theological Differences:
Hebrews contains unique theological themes and approaches not seen in Paul’s epistles. It emphasizes Jesus as the high priest in a manner that is distinct from Paul’s writings.
Anonymity and Audience:
The letter is written anonymously, and its audience appears to be Jewish Christians familiar with the Old Testament. The anonymity might suggest that the author was well-known to the recipients but chose to remain unnamed.
Leading Theories Today
Apollos:
Martin Luther proposed Apollos, an eloquent speaker mentioned in Acts 18:24-28. Apollos was well-versed in Scriptures and a colleague of Paul, fitting the profile of the author of Hebrews.
Priscilla:
Some modern scholars have suggested Priscilla, an early Christian missionary mentioned in Acts and Paul's letters. This theory suggests that the anonymity might be due to the author being a woman, which might have been controversial at the time.
Others:
Other suggestions include Silas, Philip the Deacon, and others, but these are less widely accepted.
Conclusion
The true authorship of Hebrews remains unknown. The book's high-quality Greek, distinct theological themes, and the fact that the author was likely a well-educated and respected figure in the early Christian community contribute to the ongoing mystery. While Paul, Apollos, and Priscilla are among the most frequently suggested candidates, the lack of definitive evidence means that the author’s identity remains a matter of scholarly debate and speculation.
So we still don't know.