The Early Sessions, Book 4

"A cure of any kind will never depend upon any given treatment. It will in all cases depend upon the belief on the part of the sufferer that he can be cured. It will depend upon his desire to be cured. It will depend upon the strength of the purpose that an illness serves. It will depend upon, in the last analysis, the individual’s own ability to mobilize his own energies, for only these will effect a cure."

Session 159, Page 67