From the Orthodox Church Fathers' teachings, fasting is much deeper than just abstaining from certain foods.
Here's their understanding:
- St. John Chrysostom emphasizes that true fasting begins with the mouth - controlling not just food, but also harmful speech
- St. Basil the Great teaches that fasting must be accompanied by spiritual efforts: "Fasting with the body while continuing to sin is like flying with one wing"
- St. John Cassian warns against pride in fasting, teaching that vainglory can destroy its spiritual benefits
- St. Gregory Palamas teaches that authentic fasting involves all senses:
 - Eyes: Fast from impure looks and unnecessary entertainment
 - Ears: Abstain from gossip and idle talk
 - Tongue: Refrain from judging others and speaking evil
 - Hands: Cease from harmful actions
 - Mind: Control thoughts and desires
- St. Isaac the Syrian explains that fasting is not meant to punish the body but to:
 - Subdue passions
 - Clear the mind for prayer
 - Cultivate humility
 - Remember the poor
 - Practice self-control
- St. John Chrysostom emphasizes that money saved from fasting should be given to the poor:Â
"The fast should be kept not by the mouth alone but also by the eye, the ear, the feet, the hands and all the members of the body"