Here we have physical bodies of five people at different ages, and their corresponding astral bodies. The astral body at level 3 is a copy of the physical body at the prime of life (age 25-35 in appearance). Apparently the astral body has the same organs, cells, and atoms that make up the physical body… but everything in the astral body is of a much finer substance. The atoms are much smaller and there is a great deal more “space” between them… which apparently is why we can’t perceive the spirits around us. They don’t reflect enough physical-world light to be seen by our physical eyes.