What are the primary factors for inclusion in the christian orthodox cannon of the new testament?

The primary factors for inclusion in the Christian Orthodox canon of the New Testament include apostolic authorship, which means that the texts were either written by the apostles or closely associated with them; widespread acceptance among early Christian communities; and conformity to the core theological beliefs of Christianity. Additionally, the texts needed to demonstrate consistency with the teachings of Jesus and the early church. The process of canonization was completed by the 4th century, affirming these criteria through various church councils.