If you have promised Christ to go by the strait and narrow way, restrain your stomach, because by pleasing it and enlarging it, you break your contract. Attend and you will hear Him who says: 'Spacious and broad is the way of the belly that leads to the perdition of fornication, and many there are who go in by it; because narrow is the gate and strait is the way of fasting that leads to the life of purity, and few there be that find it.'
When He had fasted for forty days and for forty nights, and afterwards was hungry, He gave an opportunity to the devil to draw near, so that He might teach us through this encounter how we are to overcome and defeat him.
It is necessary most of all for one who is fasting to curb anger, to accustom himself to meekness and condescension, to have a contrite heart, to repulse impure thoughts and desires, to examine his conscience, to put his mind to the test and to verify what good has been done by us in this or any other week, and which deficiency we have corrected in ourselves in the present week. This is true fasting.
The Holy Fathers recommend 'moderate' fasting; one ought not to allow the body to be weakened too much, for then the soul, too, is harmed. Nor ought one to undertake fasting too suddenly; everything demands practice, and each one should look to his own nature and occupation. To choose among different kinds of food is to be condemned; all food is God-given, but it is advisable to avoid such kinds as add to the body's weight and appetite; strong spices, meat, spirituous drinks and such foods as are solely for the palate's enjoyment. For the rest, one may eat what is cheap and most easily available, they say. But by 'moderate' they mean one meal a day, and that one light enough not to fill the stomach to satiety.
For now is the time to labor for the Lord, for salvation is found in the day of affliction: for it is written: 'In your patience gain ye your souls' (Luke 21:19)
True patience consists in bearing calmly the evils others do to us, and in not being consumed by resentment against those who inflict them. Those who only appear to bear the evils done them by their neighbors, who suffer them in silence while they are looking for an opportunity for revenge, are not practicing patience, but only make a show of it.
In patience is the assembly of all the virtues by which our souls are saved, as St. Ephraim says: having acquired patience, one touches on every virtue; for one rejoices in sorrows, and is well-tried in misfortunes, is joyful in danger, ready for obedience, filled with love, glories in vexation, is humbled in reproaches, unwavering in misfortunes; he who has acquired patience has acquired hope, and such a one is adorned with every good work.
God always helps. He always comes in time, but patience is necessary. He hears us immediately when we cry out to Him, but not in accordance with our own way of thinking. You think that your voice did not immediately reach the saints, our Panagia, and Christ. On the contrary, even before you cried out, the saints rushed to your aid, knowing that you would call upon them and seek their God-given protection. However, since you do not see beyond what is apparent and do not know how God governs the world, you want your request to be fulfilled like lightning. But this is not how things are. The Lord wants patience. He wants you to show your faith. You cannot just pray like a parrot. It is necessary also to work towards whatever one prays for, and then to learn to wait.
What good is it to keep meat out of your mouth if you bite your brother with wickedness? What good does it serve you to observe a strict frugality at home if you unjustly steal from the poor? What kind of piety teaches you to drink water while you hatch plots and drink the blood of a man you have shamefully cheated? Judas, after all, fasted along with the eleven, but failed to master his greed; his salvation gained nothing by fasting. And the devil does not eat, for he is an incorporeal spirit, but he fell from on high through wickedness. Likewise, none of the demons can be accused of gorging themselves, of excessive drinking or getting drunk, for their nature makes feeding unnecessary; nevertheless, night and day, they roam through the air, agents and servants of evil, eager for our loss. They ooze with bitterness and jealousy—things it is well to avoid—at the idea that humans may enter into an intimacy with God, since they have fallen from the supremely worthy dwelling.
I shall speak first about control of the stomach, the opposite to gluttony, and about how to fast and what and how much to eat. I shall say nothing on my own account, but only what I have received from the Holy Fathers. They have not given us only a single rule for fasting or a single standard and measure for eating, because not everyone has the same strength; age, illness or delicacy of body create differences. But they have given us all a single goal: to avoid over-eating and the filling of our bellies... A clear rule for self-control handed down by the Fathers is this: stop eating while still hungry and do not continue until you are satisfied.
Patience adorns the soul with diamonds which are not of the earth but belong to the Jerusalem that is above. Patience is a sweet word. Patience is a sweet breath. Patience is an invincible weapon. Patience is a priceless adornment of man. Patience is a blessing of God.
The body is a slave, the soul a sovereign, and therefore it is due to Divine mercy when the body is worn out by illness: for thereby the passions are weakened, and a man comes to himself; indeed, bodily illness itself is sometimes caused by the passions.
Fasting is beneficial when it is undertaken for quelling desire, humbling the soul, transforming hatred, extinguishing anger, erasing remembrance of wrongs, and for the purity of the understanding and the practice of prayer.