It will be the aim of this book to distinguish the nature and function of different sorts of tradition within the historic Christian faith. The main task which the book will set itself will be to examine as fairly and as fully as possible the likelihood of the survival of original, authentic tradition within the Christian Church outside the Bible, to see whether there are solid grounds for concluding that independently of the New Testament any considerable or significant amount of original and trustworthy information about Jesus . . . could have survived, and whether it actually has survived. --From the first chapter, Oral Tradition