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This statement suggests that the power to heal one's body lies in the mind and that the mind can be used to positively affect physical health. This idea is supported by the field of psychoneuroimmunology, which studies the connections between the brain, the nervous system, and the immune system. It has been found that stress and negative emotions can have a negative impact on the immune system, while positive emotions and relaxation techniques can have a beneficial effect. However, it is important to note that this statement should not be taken as a substitute for medical treatment and it is always best to consult a medical professional for any health concerns.