A very good piece you've written here, Graham. As you might expect, I'm fully in support of your basis in Jungian psychology. But I'd just like to say that existentialism can be non-materialist and spiritual; it is the outdated, pessimistic existentialism of Sartre and Camus that needs to be discarded, if it hasn't been already, because it failed, or was unable, to take the nature of consciousness into account. I would contend that if one accepts that consciousness is primary, fundamental and causal then it opens up a whole new realm of existentialist thought. We are thus inextricably bound up with the universe, as was realised by Dr Percy Seymour in his book 'The Scientific Proof of Astrology' (2004) in which he theorises that the human nervous system can act as an antenna through which vibrations in the Earth's magnetic field can be detected. this field being subject to subtle variations linked to the sun, moon and planets.