The soul that is nourished is able to support the body

[Mary Naeem]

Pope Shenouda III

The soul that is nourished is able to support the body.
This is clearly seen during Passion Week when asceticism becomes intense, with long periods of abstinence. Nevertheless, the body endures without becoming tired because the soul is nourished by the memories of Christ's suffering by on Passion Week. Bible readings, hymns, and rites all focus the mind on Passion Week and the suffering of our Lord.
There are times when a person may be so absorbed by the satisfaction and pleasure of what he reads that he may forget about his craving for food so that he can proceed with his readings. The soul becomes nourished to the extent that it sustains the body, which does not feel any hunger.
Therefore, give the soul its nourishment during a fast and rest assured that nourishment of the soul gives the body the strength it needs to endure the fast. Moreover, fasting of the body empower the soul, for the spiritual action is intermingled with the bodily and mental asceticism. Prayers and masses during a fast are more profoundduring fasts for they emanate from a body, which has submitted to the soul. Your prayer becomes powerful since they emanate from a heart abstained from materialistic things and a soul abstained from the worldly lusts. Such as the vespers and midnight prayers performed with a light body abstaining from food.
During the fasts, our Fathers concerned themselves with the work of the soul.