Fasting in the monastic community is considered an ascetic practice, a “dhutanga” practice. Dhutanga means “to shake up” or “invigoration”. The Buddha, as is well known, emphasized moderation, the Middle Way that avoids extremes, in all things. Fasting is an additional method that one can take up, with supervision, for a time.
You may control a mad elephant; You may shut the mouth of the bear and the tiger; Ride the lion and play with the cobra; By alchemy you may earn your livelihood; You may wander through the universe incognito; Make vassals of the gods; be ever youthful; You may walk on water and live in fire; But control of the mind is better and more difficult.
One of the most difficult things everyone has to learn is that for your entire life you must keep fighting and adjusting if you hope to survive.

