A calm and undisturbed mind and heart is life and health to the body (Pro. 14: 31). So many things and people can disturb one's mind and affect the calmness and serenity of life. So many things are beyond our control, but how we are affected by them, are within our control. We can both 'foam up quickly and fly into a passion' (Pro. 14: 17), or choose to be joyful regardless of circumstances. These are tests of life. Losing our calm, and becoming disturbed about uncontrollable situations, and saying, "you made me mad', or "life sucks" just robs a person of God's life and health for one's body.
If like me, you find this incredibly difficult to maintain consistently for any length of time, it has and will affect the life and health of one's body.
Lord, help us to desire and maintain a calm and undisturbed mind and heart, no matter the external circumstance. Forgive us for foaming up quickly with passion when life, people, situations, betray, offend, or persecute us. Give us your peace, and help us keep it.