"There are big questions science doesn't answer, such as why is there something rather than nothing? There can't be a scientific answer to that because it's the answer that precedes science. There are all sorts of questions like that that which at the periphery of scientic inquiry but which wiggle in the mind like worms: the question "what am I, what is this word 'I'"? Does it refer to anything? If you try to capture the "I", you don't capture it, you capture the object, in which case it's a nothing, but it's a nothing on which everything depends. But this nothing on which everything depends thinks of itself as free. This is a philosophical question that worries everyone, but you can't formulate it."