Fasting is about much more than food. In fact, you might even say that food is merely the icon: in fasting from food we learn to fast from needless speaking, from coarse jesting, from time-wasting and often sin-enticing entertainments. Abstaining from food manifests outwardly an inner abstention from selfish thoughts, fantasies, self pity, and the judging of others.

—Archpriest Michael Gillis, Spiritual Disciplines