Non-physical dimensions emerge in one's deeper awareness through first-hand experience. Different dimensional levels co-exist beyond what the five senses detect. Normal laws of physics do not apply. Notice how you resist or openly accept the possibilites beyond your frames of reference and experience.
Imagine what happens as the physical body sleeps. In essence, consciousness reflects copies of itself. The dream mind and projected body/ mind double function in relation to, yet separate from the physical body. As one accesses memories from the physical and energy body, a visceral experience speaks for itself. Which perceptual interchanges do you sense? What insight are you gaining into the higher self right now?