"It pervades the universe", Emmanual said, "from the microcosm to the macrocosm. It has been called one of the names of god" Philip K. Dick, The Divine Invasion, p. 141

Phi - 1.61803..., the golden number, the divine ratio - for Dick it is a doorway to higher realms, to "The Secret Commonwealth". In Valis he travels to ancient Greece through a doorway proportioned like a golden rectangle.