In divine revelation more is less and less is more. This means the more revealed it is the less essence it is. There are basically three levels 1) Limbs; life is fully revealed (and contained) in the body 2) Hair carry a higher light but it’s not revealed as much 3) The essence (represented by the forehead) that carries (but doesn’t reveal at all) the essence. Pages 376-9, NEW SV Pages 495-8.