F.F. Bruce, The New Testament Documents : Are They Reliable ? 1949, p. 15.
The evidence for our New Testament writings is ever so much greater than the evidence for many writings of classical authors, the authenticity of which no-one dreams of questioning. And if the New Testament were a collection of secular writings, their authenticity would generally be regarded as beyond all doubt. It is a curious fact that historians have often been much readier to trust the New Testament than have many theologians.
F.F. Bruce, The New Testament Documents: Are They Reliable? 1949, p. 15.