It is the routine activity of the brain, and especially the mental tendency toward anxiety and fear which is expressed through it, which interferes with Nature's healing processes--whether these be spiritual or physical or both--or obstructs them or delays them or defeats them completely. This anxiety arises through the sufferer's confinement to his personal ego and through his ignorance of the arrangements in the World-Idea's body-pattern for the human body's protective care. The remedy is in his own hands. It is twofold: first to change from negative to positive thinking through acquiring either faith in this care or else knowledge of it; second, to give body and brain as total a rest as his capacity allows, which is achieved through fasting and in meditation. The first change is more easily made by immediately substituting the positive and opposite idea as soon as the negative one appears in his field of consciousness. He trains himself not to accept any harmful thought and watches his mind during this period of training. This constructive thought must be held and nourished with firm concentration for as long as possible. The second change calls for an abstinence from all thoughts, a mental quiet, as well as an abstinence from all food for one to three days.
-- Notebooks Category 10: Healing of the Self > Chapter 3: The Origins of Illness > # 57
-- Perspectives > Chapter 10: Healing of the Self > # 3