Each half of the brain has what we call the limbic system. The limbic system is our ability to place emotions on information coming in through our sensory system.

If there is no non-functional thought, on-going chatter, telling things that make one scared, angry or sad, the emotional system does not get activated. Fear, anger, sadness disappear.

Learning about the mechanisms of the brain helps to understand the importance of it's important but forgotten function: Unitary Perception, the only door to freedom from perturbation.