I can agree with what most people here say, especially about the Universe.
I would rather describe God as the universe when it comes to being simple, as far as it being a product of the mind I'm not so sure about.
What is our mind a product of? Magic is a much deeper than what people apprehend on the surface. Along with mental tools come spiritual tools and well who knows...maybe even our most primal tools.
The mind is a product of the brain. We owe everything to ohr brains. I am well aware of the depths of magic(k), I am just also aware that despite how deep it is there still isn't anything "magical" about it. Mental, spiritual, primal tools all work because of the brain. God is only a useful tool as long as one believes He exists, or if can use symbolism effectively.