Each impulse that is input has its effect upon body chemistry and determines the kinds of messages that get sent to the brain. Chemical substances run our bodies. They tell our organs what and how to do things.
Nerves transmit and transfer messages through chemicals known as neurotransmitters.
These are aided by other chemicals. Drugs work on the body by altering these chemicals or blocking their actions. When emotions become uncontrolled or even slightly unbalanced, the chemical transmitters in our bodies become unbalanced, destroying the harmony of the body and mind. These imbalances cause our glands to generate inappropriate hormones and enzymes - chemical poisons that can cause pain, illness, and even death. For instance, anger and fear suspend the process of digestion, acidifying the blood and drying the glandular secretions.