Nicene and Post-Nicene Fathers, Ser. II, Vol. XI:
The Works of John Cassian.: Chapter XXIII. What should be the character of the monk's food.

Chapter XXIII.

What should be the character of the monk’s food.

We should then choose for our food, not only that which moderates the heat of burning lust, and avoids kindling it; but what is easily got ready, and what is recommended by its cheapness, and is suitable to the life of the brethren and their common use. For the nature of gluttony is threefold: first, there is that which forces us to anticipate the proper hour for a meal, next that which delights in stuffing the stomach, and gorging all kinds of food; thirdly, that which takes pleasure in more refined and delicate feasting. And so against it a monk should observe a threefold watch: first, he should wait till the proper time for breaking the fast; secondly, he should not give way to gorging; thirdly, he should be contented with any of the commoner sorts of food. For anything that is taken over and above what is customary and the common use of all, is branded by the ancient tradition of the fathers as defiled with the sin of vanity and glorying and ostentation. Nor of those whom we have seen to be deservedly eminent for learning and discretion, or whom the grace of Christ has singled out as shining lights for every one to imitate, have we known any who have abstained from eating bread which is accounted cheap and easily to be obtained among them; nor have we seen that any one who has rejected this rule and given up the use of bread and taken to a diet of beans or herbs or fruits, has been reckoned among the most esteemed, or even acquired the grace of knowledge and discretion. For not only do they lay it down that a monk ought not to ask for foods which are not customary for others, lest his mode of life should be exposed publicly to all and rendered vain and idle and so be destroyed by the disease of vanity; but they insist that the common chastening discipline of fasts ought not lightly to be disclosed to any one, but as far as possible concealed and kept secret. But when any of the brethren arrive they rule that we ought to show the virtues of kindness and charity instead of observing a severe abstinence and our strict daily rule: nor should we consider what our own wishes and profit or the ardour of our desires may require, but set before us and gladly fulfil whatever the refreshment of the guest, or his weakness may demand from us.