This document discusses the concept of mental fitness and its benefits for physical health and well-being. It argues that the mind and body are interconnected, so improving mental fitness through exercises like meditation can lead to positive physical effects. Meditation practices like loving-kindness meditation are described to help cultivate peace of mind and compassion, which can reduce stress and disease. Research is cited showing relationships between spirituality, prayer, and positive health outcomes. The goal of mental fitness is to train the mind to higher states of awareness to access its natural healing abilities.