"Orthorexia begins innocently enough, as a desire to overcome chronic illness or to improve general health. But because it requires considerable willpower to adopt a diet which differs radically from the food habits of childhood and the surrounding culture, few accomplish the change gracefully. Most must resort to an iron self-discipline bolstered by a hefty sense of superiority over those who eat junk food. Over time, what they eat, how much, and the consequences of dietary indiscretion come to occupy a greater and greater proportion of the orthorexic's day.
The act of eating pure food begins to carry pseudo-spiritual connotations. As orthorexia progresses, a day filled with sprouts, umeboshi plums and amaranth biscuits comes to feel as holy as one spent serving the poor and homeless. When an orthorexic slips up, (which, depending on the pertinent theory, may involve anything from devouring a single raisin in violation of the law to consuming a gallon of Haagen Daz ice cream and a supreme pizza), he experiences a fall from grace, and must take on numerous acts of penitence. These usually involve ever stricter diets and fasts.
Over time, this "kitchen spirituality" begins to override other sources of meaning. An orthorexic will be plunged into gloom by eating a hot dog, even if his team has just won the world series. Conversely, he can redeem any disappointment by extra efforts at dietary purity."