If consciousness is energy, then I suppose you don't need proof that it survives death, because proof already exists: the First Law of Thermodynamics - energy is neither created or destroyed. Though it's hard to take much comfort from this. Who wants to spend eternity as a blip, a gnat's fart, of disordered energy, with no brain at your disposal to help you remember or imagine or solve the Sunday crossword? What would it be like? Would there even be a be? Nahum uses the analogy of the computer: perhaps you'd be the operating system, stripped of its programs and interfaces. Heaven as the back of the closet where the broken-down Dells and Compaqs go.