I must admit that enthusiasm for fasting is sometimes hard to muster. It must be because I don't realize the incredible results of fasting. The moment we offer God something related to our body, we can say that we truly give ourselves. Giving money, time, a good word, or getting involved in service is easy. Whereas fasting concerns not only our body, but also something vital.
Food is a matter of survival and relates to deep ontological habits.
Now Mary does not come to point out our attachments, she comes so that we may be free, liberated. Fasting reveals to what extent we are dependent on our daily schedule. And so it is, when we fast we clear away many of the things in our life that might be tools for the enemy. We take away his entry points into our hearts. And instead we give God a place to be within us.