1. Fasting
The first universal precept is that of fasting. The Orthodox teaching concerning fasting is different from the Roman Catholic doctrine and it is essential to understand it. Roman Catholics identify fasting with a "good deed," see in it a sacrifice which earns us a "merit." "What shall I give up for Lent?"—this question is very typical of such an attitude toward fasting. Fasting thus is a formal obligation, an act of obedience to the Church, and its value comes precisely from obedience. The Orthodox idea of fasting is first of all that of an ascetical effort. It is the effort to subdue the physical, the fleshly man to the spiritual one, the "natural" to the "supernatural." Limitations in food are instrumental; they are not ends in themselves. Fasting thus is but a means of reaching a spiritual goal and, therefore, an integral part of a wide spiritual effort. Fasting, in the Orthodox understanding, includes more than abstinence from certain types of food. It implies prayer, silence, an internal disposition of mind, an attempt to be charitable, kind, and—in one word—spiritual. "Brethren, while fasting bodily, let us also fast spiritually...."
And because of this the Orthodox doctrine of fasting excludes the evaluation of fasting in terms of a "maximum" or "minimum." Every one must find his maximum, weigh his conscience and find in it his "pattern of fasting." But this pattern must necessarily include the spiritual as well as the "bodily" elements. The Typicon and the canons of the Church give the description of an ideal fast: no dairy products, total abstinence on certain days. "He that is able to receive it, let him receive it" (Matt. 19:12). But, whatever is our measure—our fasting must be a total effort of our total being.
According to the rules of the Church the fast cannot be broken for the entire Lenten period of forty days: Saturdays and Sundays are no exception.