Parasympathetic Nervous System
The parasympathetic nervous system is part of the autonomic nervous system. Its main function is to conserve/restore your body's energy. For example, the parasympathetic nervous system is responsible for sending signals to slow your heart rate and breathing, and speed up your digestive tract in order to digest calories and save energy.
People think they can destress and regulate their emotions by using only their minds.
The Vagus Nerve Miracle