The majority of illnesses are related to overeating and not eating well. The religion has instructed us not to eat until we have an appetite, and to stop eating before becoming satiated. It is clear that those people who become miserable in the month of Ramadhan have not recognized themselves well. These people have not realized that food must be at the service of human beings, and not that human beings must be at the service of food.
Ayatullah Jawadi Amuli