teachings by the Fathers of the Church
Holy Eucharist Teachings by the Fathers of the Church
Catechetical Lectures 23, 15 (C. 350 AD):
Fathers of the Church - St. Cyril of Jerusalem
"Give us this day our supersubstantial bread. The bread which is of the common sort is not supersubstantial. But the Bread which is holy, that Bread is supersubstantial, as if to say, directed toward the substance of the soul. This Bread does not go into the belly, to be cast out into the privy. Rather, it is distributed through your whole system, for the benefit of body and soul."
Holy Eucharist teachings by the Fathers of the Church - St. Cyril of Jerusalem