“It was, if I may put it this way, an example of ‘survival of the fittest.’ In talking about the canon, Arthur Darby Nock used to tell his students at Harvard, ‘The most traveled roads in Europe are the best roads; that’s why they’re so heavily traveled.’ That’s a good analogy. British commentator William Barclay said it this way: ‘It is the simple truth to say that the New Testament books became canonical because no one could stop them doing so.’