The Authentic Gospel of Jesus

There can be no doubt that Jesus, 'a religious genius' as Geza Vermes describes him, lived and taught in Palestine some 2000 years ago. The influence he has had is incalculable. How though can we distinguish between the doctrines shaped to the needs of the burgeoning Christian church and the original views laid out by Jesus himself? How can we dig back through the additions, misinterpretations and confusions of later writers and two millennia of tradition to get back to the authentic gospel of J