David, I personally think you are spot on here. I do see Dualism as a
valid 'phase' within Idealism. As Maria Prophetissa said, 'the One
becomes Two; from the Two comes the Third; and out of the Third comes
the One as the Fourth.' (this is called the 'Axiom of Maria' in
Alchemy) So if the 'One' is the uncreated Psyche, the ground of
existence, the first phase of its manifestation may be its division
into two aspects of opposing psychic aspects that one may call
Dualism. SO indeed Dualism may exist as a valid metaphor within
Idealism. Bernardo.