Using concepts like hylozoism (the doctrine that all matter has life) Dick tries to explain how the universe is a living creature with a soul, which is what he depicted in Ubik.
He quotes a passage about the sixteenth century Italian philosopher Giordano Bruno from Will Durant’s book The Age of Reason Begins. Bruno wrote about the idea of a living God which is the universe. Dick wasn’t aware of this model of the world even though he based Ubik on it. Once again he feels he has “cracked the case” and achieved fulfillment.
Dick has decided definitively that the space he occupied in his recent dreams is the inner firmament spoken of by Paracelsus whose teachings were introduced to him by Thomas even though Paracelsus was a German Renaissance philosopher. My simple understanding of this is that the inner microcosm of one man’s mind is a mirror of the macrocosm of the universe. The micro mind can experience the totality of the macro mind.
Dick begins to wonder if USA 1974 is real but maybe he is not. But then where does he exist? Perhaps it is belief in the world around us that makes it real and it is our psyche which creates the universe.
Through Ubik Dick has attracted the attention of the Soviets, because by dismantling time and space through his line of thinking he is also tearing down the ideas capitalism is based on.