The Spirits' Book
Book Two - The Spirit World
Chapter VIII - Emancipation of the Soul
429. How can the somnambulist see through dense bodies?
“Bodies are only dense to your rudimentary senses and organs. We have told you that matter is not an obstacle for a spirit, since it can freely pass through it. Somnambulists often tell you that they see through their forehead, knee, and so on, and because you are bound to matter, you do not understand that they can see without their receptor organs. However, when your ideas infuence them, they may be fooled into believing that they actually need those organs. If left to their own devices, they would understand that they see through every part of their bodies, or, rather, that their vision is completely separate from the body.”