“Your dreams affect your cellular reality, even as that reality is also largely responsible for the fact that you dream, in your terms, at all. Dreams are a natural “product” of cellularly tuned consciousness. As fire gives off light, cellularly tuned consciousness gives off dreams.
“Such a consciousness is at a state of being in which its reality generates more energy and power than it can physically express in its brilliant intersection with physical reality. The “sparks” generated by each instant of its existence cause additional experiences, perceptions, that will not fit in the known moment of the present – for by then in your terms that present has already vanished into the past.
“These events and responses continue to operate, however, particularly in the dream state where they do not intersect directly with full physical experience, as waking events do. All of these parallel or alternate experiences are then used to construct the physical events that you recognize. ”
(The Nature of the Psyche, Session 785)