The authorship of Hebrews remains uncertain, with no definitive historical proof identifying the writer. Internal biblical evidence, such as Peter's reference to Paul writing to the Dispersion of Jews in Asia Minor, provides some support for Paul's authorship, as does the alignment of Hebrews with Paul's assignment from Christ to bear His name before Gentiles, kings, and the children of Israel. However, the writing style of Hebrews differs from Paul's other epistles, lacking the roughness typically associated with his letters and instead displaying an elegant quality of grammar, described by some Greek scholars as the best among New Testament epistles. While Hebrews begins as a formal treatise, it concludes as a personal letter, similar to Paul's usual style. Alternative suggestions for authorship, such as Luke or someone close to Paul, have been proposed, but these remain speculative. The anonymity of the author shifts the focus to the main character, Christ, and underscores the epistle's universal applicability, as it lacks an opening salutation identifying specific addressees.

The authorship of the epistle to the Hebrews remains a matter of speculation. The writing style varies somewhat from Paul's other letters, lacking the normal, pedestrian roughness researchers expect from his writing in other epistles. Some have described Hebrews' prose as elegant, the best written of all New Testament epistles in terms of grammar quality. At its beginning, it is organized as a treatise, a formal and systematic account of a subject, and reads as though it is a college lecture, while it concludes as a personal letter from a church pastor, similar to Paul's usual style. Whoever authored Hebrews had an unusually clear understanding of worship under the Old Covenant as both a participant and a keen observer. Some speculate that Luke, Apollos, or even Priscilla wrote it, but the best candidate for its human authorship is the apostle Paul, though it remains uncertain. It is suggested that Paul provided the accurate material contained in the epistle, but someone more skilled grammatically may have smoothed out his writing.

The epistle to the Hebrews presents several challenges in understanding its authorship and form, contributing to its relative neglect among modern church members. One significant issue is that the human author did not sign this labor of love, which, combined with the epistle's complexity and length of 13 chapters, often frustrates readers accustomed to the apparent simplicity and brevity of other epistles. Additionally, internal evidence suggests that the epistle was written around AD 65, before the destruction of the Temple in Jerusalem in AD 70, as it notes the Temple was still in operation with sacrifices continuing. Many researchers propose that the apostle Paul may be the author, despite his name not appearing on the document, and this is supported by the timing, as Paul was assassinated around AD 67 or 68, allowing for the possibility of his authorship before that period. However, the ultimate Author is God, who inspired the epistle's unique design, blending elements of a letter, treatise, and sermon, making it a magnificent teaching vehicle regardless of its human scribe. The author himself referred to his work as a "word of exhortation," a term commonly associated with a sermon message in that era, as seen in other New Testament contexts, suggesting a primary sermonic intent to prepare recipients for impending trials.