John's gospel has had an incalculable impact on human history. Its pages contain moral and spiritual potency which, over the centuries, has transformed communities, brought about political change and remade human character on a scale without precedent. That power remains in the gospel today. At the centre is the fact that Jesus Christ himself in his glory and grace, majesty and tenderness. The author believes tha we can experience his presence even today, for the gospel was 'written that...you may have life in his name.'