Sit by a body of water and you will observe wave patterns emerging and disappearing. These patterns are created by energy moving through the medium of water. If you are by the ocean you may feel that energy crash into the beach and move through the land. Physics says everything is a wave, including us. When you move your arm, you create an invisible wave of energy that moves through the energy surrounding you. I think of wave patterns as metaphors for human experience and interactions that leave a pattern in our brain.