In the case of a book that deals mainly with _principles_, the question of authorship is of subordinate importance. Thus the book of Job, with the exception of the brief narratives with which it opens and closes, and which may belong to any one of several centuries, is occupied with the question of Divine providence. It is not necessary that we know what particular man was its author, or at what precise period he wrote. We only need reasonable evidence (as will be shown hereafter) that he was a prophetical man, writing under the guidance of the Holy Spirit. But the case of the gospel narratives is wholly different. They contain a record of the supernatural appearance and works of the Son of God, on the truth of which rests our faith in the gospel. So the apostle Paul reasons: "If Christ be not risen, then is our preaching vain, and your faith is also vain." 1 Cor. 15:14. It is, then, of vital importance that we know the relation which the authors of these narratives held to Christ. If they were not _apostles_ or _apostolic men_, that is, associates of the apostles, laboring with them, enjoying their full confidence, and in circumstances to obtain their information directly from them--but, instead of this, wrote after the apostolic age--their testimony is not worthy of the unlimited faith which the church in all ages has reposed in it. The question, then, of the genuineness of the gospel narratives and that of their authenticity and credibility must stand or fall together. 2. In respect to the _origin_ of the gospels, as also of the other books of the New Testament, the following things should be carefully remembered: _First._ There was a period, extending, perhaps, through some years from the day of Pentecost, when there were no written gospels, their place being supplied by the living presence and teachings of the apostles and other disciples of our Lord. _Secondly._ When the need of written documents began to be felt, they were produced, one after another, as occasion suggested them. Thus the composition of the books of the New Testament extended through a considerable period of years.