Ps 103:14

“Let Celsus then say distinctly that the great diversity among the products of the earth is not the work of Providence but that a certain fortuitous concurrence of atoms gave birth to qualities so diverse, and that it was owing to chance that so many kinds of plants and trees and herbs resemble one another, and that no disposing reason gave existence to them, and that they do not derive their origin from an understanding that is beyond all admiration. We Christians, however, who are devoted to the worship of the only God, who created these things, feel grateful for them to him who made them, because not only for us but also (on our account) for the animals that are subject to us, he has prepared such a home, seeing "he causes the grass to grow for the cattle, and herb for the service of humans, that they may bring forth food out of the earth and wine that makes glad the heart of people, and oil to make their faces to shine, and bread that strengthens humans' hearts." But that he should have provided food even for the most savage animals is not a matter of surprise, for these very animals are said by some who have philosophized [on the subject] to have been created for the purpose of affording exercise to the rational creature. And one of our own wise men says somewhere, "Do not say, What is this? or Wherefore is that? for all things have been made for their uses. And do not say, What is this? or Wherefore is that? for everything shall be sought out in its season."”

“Having learned these things and been fully assured that what seems to be bread is not bread, though sensible to taste, but the body of Christ; and that what seems to be wine is not wine, though the taste will affirm that it is so, but the blood of Christ; and that of this David sang long ago, saying, "And bread strengthens a person's heart, to make his face to shine with oil," "strengthen you your heart," by partaking of it as spiritual, and "make the face of your soul to shine." And so having it unveiled with a pure conscience, may you "reflect as a mirror the glory of the Lord" and proceed from glory to glory, in Christ Jesus our Lord, to whom be honor and might and glory for ever and ever. Amen.”

“"Bringing forth grass for the cattle, and green herb for the service of men" [Psalm 104:14]. This is true, I perceive; I recognise the creation: the earth doth bring forth grass for the cattle, and green herb for the service of men. But I perceive the words, "Thou shall not muzzle the mouth of the ox which treadeth out the corn: Doth God take care for oxen? For our sakes therefore the Scripture saith it." How then doth the earth bring forth grass for the cattle? Because "the Lord hath ordained that they which preach the Gospel should live of the Gospel." He sent preachers, saying unto them, "Eat such things as are set before you of them: for the labourer is worthy of his hire." ...They give spiritual, they receive carnal things; they give gold, they receive grass. ..."If we have sown unto you spiritual things, is it a great matter if we shall reap your carnal things?" This the Apostle said, a preacher so laborious, so indefatigable, so well tried, that he giveth this very grass to the earth. "Nevertheless," he saith, "we have not used this power." He showeth that it is due to him, yet he received it not; nor hath he condemned those who have received what was due. For those were to be condemned who exact what is not due, not they who accept their recompense: yet he gave up even his own recompense. Thou dost not cease to owe to another, because one hath given up his dues, otherwise thou wilt not be the watered earth which bringeth forth grass for the cattle. ...Thou receivest spiritual things, give carnal things in return: to the soldier they are due, to the soldier thou returnest them; thou art the paymaster of Christ. "Who goeth a warfare any time at his own charges? who planteth a vineyard, and eateth not of the fruit thereof? or who feedeth a flock, and eateth not of the milk of the flock? I speak not thus, that it should be so done unto me." There has been such a soldier as gave up his rations of food even to the paymaster: yet let the paymaster pay the rations. ..."That it may bring forth bread out of the earth." What bread? Christ. Out of what earth? From Peter, from Paul, from the other stewards of the truth. Hear that it is from the earth: "We have," saith St. Paul, "this treasure in earthen vessels, that the excellency of the power may be of God, and not of us." He is the bread who descended from heaven, that He might be brought forth out of the earth, when He is preached through the flesh of His servants. The earth bringeth forth grass, that it may bring forth bread from the earth. What earth bringeth forth grass? Pious, holy nations. That bread may be brought forth out of what earth? The word of God out of the Apostles, out of the stewards of God's Sacraments, who still walk upon the earth, who still carry an earthly body.”