A common analogy used in metaphysics compares the Source Individualogist Review to an infinite ocean and the Soul to a drop in the ocean. The Soul is in the Source and the Source is in the Soul. The ancient shamans were well aware of this nondual reality thousands of years before the first theories of quantum mechanics.
The holographic principle essentially states that the 2D reality -- which I call the source -- of holographic film stores everything that we can see, hear, taste, feel, and touch in this 3D reality that we call the universe. I like to call think of the 2D source reality as a cosmic hard drive from which the 3D reality is projected. Consciousness is the Source and the world form is simply the construct or "software" for which consciousness is able to interact.
Altered state experiences such as an OBE (out of body experience) or NDE (near death experience), kundalini awakening, as well as psychic phenomena and supernatural abilities can all be explained as brief encounters into this mystifying, deeper realm of reality that transcends spacetime boundaries. Philosopher, Ken Wilber, refers to it as a "holistic frequency realm." No doubt, this plane of higher frequencies has been the visiting place for the world's great sages and shamans throughout the ages.