Then there is another aspect of self-discipline which is connected with eating or drinking: one avoids certain things in one's everyday food or drink, and makes a practice of being able to live without them, especially things that one feels one cannot live without. This is one of the reasons, apart from the psychological and physical ones, that some adepts live on a diet of fruit and vegetables; that for days or weeks or months they go without certain things that they are accustomed to eat or drink.