Calm mind brings inner strength and self-confidence, so that's very important for good health.
Peace is the result of retraining your mind to process life as it is, rather than as you think it should be.
Inner peace is the key: if you have inner peace, the external problems do not affect your deep sense of peace and tranquility.
God grant me the serenity to accept the things I cannot change, courage to change the things I can, and wisdom to know the difference.
Anxiety does not empty tomorrow of its sorrows, but only empties today of its strength.
You find peace not by rearranging the circumstances of your life, but by realizing who you are at the deepest level.