By being grateful you activate the part of the brain that is associated with positive emotions and you deactivate your amygdala, the part of the brain that ignites fear, hurriedness, and stress.
It is physiologically impossible to be stressed and grateful at the same time. Being grateful is a powerful physical and mental energizer. When you walk, drive, or go about your busy day with a focused positive thought, you produce endorphins and flood your brain with calming neurotransmitters, such as serotonin and dopamine, which make you feel happier, more energized and calmer. A positive thought of gratitude or appreciation, will help you decrease the stress that zaps your energy and cause the release of hormones and neurotransmitters that boost your energy. With that in mind, when you go about your day, what one thought of appreciation and gratefulness could you use when faced with a stressful situation? Notice what happens and notice the difference in how you feel.
Jack Witt, MS CPT