There is an appearance of humility in the protestation that the truth is much greater than any one of us can grasp, but if this is used to invalidate all claims to discern the truth it is in fact an arrogant claim to a kind of knowledge which is superior to [all others]...We have to ask: 'What is the [absolute] vantage ground from which you claim to be able to relativize all the absolute claims these different scriptures make?