The Book of Hebrews was written by an unknown author.
The fourteenth of the Epistles, and the nineteenth book in the New Testament, is entitled Hebrews. It was written in approximately 68 AD, but by whom, we do not know. Several possible authors have been credited with the work, but the style of writing is unlike any other books in the Bible, and so the author remains unknown.
The letter is addressed to Jewish Christians, many of whom found themselves persecuted by their fellow Jews. The writer of Hebrews fears that Jewish Christians are in danger of slipping back into the Jewish faith because of this persecution. To affirm them in their new found Christian faith, the author shows them Christ's superiority over all Old Testament laws and practices. He urges the Christians to remain true to the Gospel of Jesus Christ, their saviour.
Hebrews 12:5-6
"And ye have forgotten the exhortation which speaketh unto you as unto children, My son, despise not thou the chastening of the Lord, nor faint when thou art rebuked of him: for whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth"