This section is from the book "The Hygienic System: Fasting And Sun Bathing", by Herbert M. Shelton. Also available from Amazon: The Hygienic System Vol III Fasting and Sun Bathing.
Other drug habits, such as the opium and morphine habit, the cocaine habit, the chloral habit, etc., are developed in much the same manner and follow much the same course in their development as the tobacco and alcohol habits. First resorted to in our search for "relief" from strain and tension, or from pain, or sleeplessness, or because of our mad search for thrills, the use of these drugs becomes a habit. This damages and enervates the nervous system to such an extent that the user is uneasy, uncomfortable, in pain and distress. He returns to his narcotic as a means of escaping from his intolerable suffering. Drug addiction is a phase of man's incurable escapism.
The drug addict uses no more intelligence in his search for "relief" from his exhaustion, unease and actual pain than does the sufferer with the jumping ache of a diseased tooth. His groaning nerves will not permit him to sleep and his distress cries out for "relief." "Relief" he will have if he has to die to get it. His resort to alcohol, or morphine, or cocaine, or other "relieving" poison is no more a matter of morals than the forceps of the dentist.