Robert Thurman of shows that many Buddhist concepts go hand in hand with understandings from physics, biology, and psychology. No theory about reality is ‘ultimate’. Quantum theory demonstrates that matter is not primary. We are in a non-dual world. The ordinary person does not perceive the world objectively. One cannot say that ‘reality’ fundamentally is either consciousness or matter. This has a bearing on beliefs about an immortal self. The Self is not a fixed point. Blind faith is not a reliable thing; except perhaps for the idea of causation. The question is posed: ‘How can there be one truth?’