THE FIFTEENTH INSTRUCTION. ON THE HOLY FORTY DAYS OF LENT
So blessed, O brethren, is he who preserves himself well in these holy days as he should. For though it might happen that being human we sin out of infirmity or negligence, still God has given these holy days in order that, striving with heedfulness and humility of wisdom, we take care for ourselves and repent for all of our sins, and we will be cleansed of the sins we committed during the whole year. Then our souls will be delivered from their weight, and we will arrive at the Holy Day of the Resurrection cleansed, receive Communion of the Holy Mysteries uncondemned, having become new through the repentance of the Holy Fast. In spiritual rejoicing, with God’s help, we will celebrate the entire Holy Pentecost season–for the Pentecost season, as the Holy Fathers say, is the repose and resurrection of the soul. This is signified by our not kneeling during whole Holy Pentecost season.
Thus he who desires during these days of Lent to be cleansed of the sins he has committed over the course of the whole year should first of all refrain from eating much food, for the lack of limitation in food, as the Fathers say, gives birth to every evil in man. … However we must not limit our temperance to food, but refrain also from every other sin. Just as we fast with our stomachs, we should fast also from every other sin; just as we fast with the belly, we should fast also with the tongue, restraining it from slander, from lying, idle-talking, from belittlement, from anger, and in a word, from every sin that is performed by the tongue. We must likewise fast with the eyes, that is, not look at vain things, not give freedom to our eyes, not look at anyone shamelessly and without fear. The hands and feet should also be constrained from every evil deed. Having fasted, as St. Basil the Great says, by a favorable fast, removing ourselves from all the sins of all of our senses, we shall attain to the holy day of the Resurrection, having become as we have said, new, pure and worthy of Communion of the Holy Mysteries. …