We've been taught to think of an impenetrable "veil" existing between our 3D physical perceptions and our non-3D selfhood. When we truly get what Rita is saying, then quotes like this from Seth seem so obvious.
“In a fashion man also is equipped with the ability to initiate actions on a nonphysical level that then become physical and continue to wind in and out of both realities, entwining dream events with historic ones, in such a fashion that the original nonphysical origins are often forgotten. Man overlays the true reality quite spontaneously. He often reacts to dream events as if they were physical, and to physical events as if they were dreams. This applies individually and collectively, but man is often unaware of that interplay.”
(Dreams, “Evolution” and Value Fulfillment Vol 2, Session 919)