The more he comes into harmony with the cosmic order, the more will his health and strength benefit, his thoughts and feelings become positive. But this is not to say that he will be cured of existing maladies or be kept in perfect health. Harmony means that due regard and attention will be given to the body's importance, hygiene, care, and correct feeding. It means that the thoughts and feelings will be constructive.
-- Notebooks Category 10: Healing of the Self > Chapter 2: The Universal Life Force > # 42