St. Teresa de Jesus says that “give us this day our daily bread” refers clearly to the Blessed Sacrament. She argues that “this day” means “our life on earth,” and “our daily bread,” means “the bread that sustains us through all our days.” In other words, a person can receive the Eucharist once and, hypothetically, have enough grace to sustain him for every day of his life.
“We have now reached the conclusion that the good Jesus, being ours, asks His Father to let us have Him daily — which appears to mean “for ever”. While writing this I have been wondering why, after saying “our ‘daily’ bread”, the Lord repeated the idea in the words “Give us this day, Lord.” I will tell you my own foolish idea: if it really is foolish, well and good — in any case, it is quite bad enough that I should interfere in such a matter at all. Still, as we are trying to understand what we are praying for, let us think carefully what this means, so that we may pray rightly, and thank Him Who is taking such care about teaching us. This bread, then, is ours daily, it seems to me, because we have Him here on earth, since He has remained with us here and we receive Him; and, if we profit by His company, we shall also have Him in Heaven, for the only reason He remains with us is to help and encourage and sustain us so that we shall do that will, which, as we have said, is to be fulfilled in us.
In using the words “this day” He seems to me to be thinking of a day of the length
of this life. And a day indeed it is! As for the unfortunate souls who will bring damnation upon themselves and will not have fruition of Him in the world to come, they are His own creatures, and He did everything to help them on, and was with them, to strengthen them, throughout the “to-day” of this life, so it is not His fault if they are vanquished. They will have no excuse to make nor will they be able to complain of the Father for taking this bread from them at the time when they most needed it. Therefore the Son prays the Father that, since this life lasts no more than a day, He will allow Him to spend it in our service. As His Majesty has already given His Son to us, by sending Him, of His will alone, into the world, so now, of that same will, He is pleased not to abandon us, but to remain here with us for the greater glory of His friends and the discomfiture of His enemies. He prays for nothing more than this “to-day” since He has given us this most holy Bread. He has given it to us for ever, as I have said, as the sustenance and manna of humanity. We can have it whenever we please and we shall not die of hunger save through our own fault, for, in whatever way the soul desires to partake of food, it will find joy and comfort in the Most Holy Sacrament. There is no need or trial or persecution that cannot be easily borne if we begin to partake and taste of those which He Himself bore, and to make them the subject of our meditations.” (Way of Perfection Ch. 34, paras. 1-2).