The third auric layer is our mental body. It is associated with our vibrational level of thought and our mental process of our ego. It relates to our solar plexus energy center and extends three to eight inches around our physical.
Our astral body or our fourth auric layer is associated with areas of expression on a physical, emotional, and mental level. It is related to our heart energy center.
The astral body is a bridge between our denser or the lower vibrations of our physical plane and the finer or higher vibrations of our spiritual planes. This layer is the layer that all energy must pass through when going from one world to the other. It extends out about a foot from our physical.