Author: H. H. Pope Shenouda Ill.
Those who fast and receive no benefit from it must have fasted in a wrong way; in this case, what is to blame is not fasting itself, but the method followed. Fasting is a period of concentrated spiritual activity, a period of loving God and adhering to Him.
As a result of this love, one who fasts is lifted above the level of the body and its concerns. He soars above worldly matters, to get a taste of the heavenly. It is a period of sacred feelings towards God, and ultimately, it harbours the feeling that one is close to, and familiar with, Him.