"When you talk about your peace of mind, or happiness, or being "satisfied with the way things are going," you're referring to mental health. It has to do with the way you get along mentally in everyday life - on your job, at home, in your social life and in your community. They way you harmonize your abilities, ambitions, feelings and conscience in order to meet life's demands as you face them. All this determines your mental and emotional stability. If you're mentally healthy you're also a good friend, good worker, good husband or wife, good parent and good citizen."
Good Reading Rack Service, 1956