“If one discards the Bible as unreliable historically, then he or she must discard all the literature of antiquity.” ~ Josh McDowell

The reason McDowell says this is because the evidence for the reliable of the Scripture is a lot stronger than for other works of antiquity. Historians gauge the accuracy and reliability of historical manuscripts, amongst other things, on the time gap between when events happened and when they were recorded and also on the number of copies of the manuscript. The Bible and the books of the New Testament in particular score exceptionally well on both counts.