we percieve things according to our experience. we commonly see characteristics by opposition, by polarity. this is the functioning of consciousness. the mother/father distinction is our fundemental model for this.
throughout the world, we have 'creation myths'/cosmologies *based on our consciouness*... yin/yang ; earth mother/sky father ; matter/idea[spirit]...
these are about the origin of our consciousness, rather than that of the world.
-- R'zenboom Signal.ds