From the opening of chapter one in For the Life of the World by Alexander Schmemann:
“Man is what he eats.” With this statement the German materialistic philosopher Feuerbach thought he had put an end to all “idealistic” speculations about human nature. In fact, however he was expressing, without knowing it, the most religious idea of man. …In the biblical story of creation man is presented, first of all, as a hungry being, and the whole world as his food. Second only to the direction to propagate and have dominion over the earth, according to the author of the first chapter of Genesis, is God’s instruction to men to eat of the earth: “Behold I have given you every herb bearing seed … and every tree, which is the fruit of a tree yielding seed; to you it shall be for meat. …” Man must eat in order to live; he must take the world into his body and transform it into himself, into flesh and blood. He is indeed that which he eats, and the whole world is presented as one all-embarrassing banquet table for man. And this image of the banquet remains, throughout the whole Bible, the central image of life. It is the image of life at its creation and also the image of life at its end and fulfillment: “… that you eat and drink at my table in the Kingdom.” 
…In the Bible the food that man eats, the world of which he must partake in order to live, is given to him by God, and it is given as communion with God. The world as man’s food is not something “material” and limited to material functions, thus different from, and opposed to, the specifically “spiritual” functions by which man is related to God. All that exists is God’s gift to man, and it all exists to make God know to man, to make man’s life communion with God. It is divine love made food, made life for man. God blesses everything He creates, and, in biblical language, this means that He makes all creation the sign and means of His presence and wisdom, love and revelation: “O taste and see that the Lord is good.”
Man is a hungry being. But he is hungry for God. Behind all the hunger of our life is God. All desire is finally a desire for Him. To be sure, man is not the only hungry being. All that exists lives by “eating.” The whole creation depends on food. But the unique position of man in the universe is that he alone is to bless God for the food and the life he receives from Him. He alone is to respond to God’s blessing with his blessing. The significant fact about the life in the Garden is that man is to name things. As soon as animals have been created to keep Adam company, God brings them to Adam to see what he will call them. “And whatsoever Adam called every living creature, that was the name thereof.” Now, in the Bible a name is infinitely more than a means to distinguish one thing from another. It reveals the very essence of a thing, or rather its essence as God’s gift. To name a thing is to manifest the meaning and value God gave it, to know it as coming from God and to know its place and function within the cosmos created by God.
To name a thing, in other words, is to bless God for it and in it. And in the Bible to bless God is not a “religious” or a “cultic” act, but the very way of life. God blessed the world, blessed man, blessed the seventh day (that is, time), and this means that He filled all that exists with His love and goodness, made all things “very good.” So the only natural (and not “supernatural”) reaction of man, to whom God gave this blessed and sanctified world, is to bless God in return, to thank Him, to see the world as God sees it and–in this act of gratitude and adoration–to know, name and possess the world. All rational, spiritual and other qualities of man, distinguishing him from other creatures, have their focus and ultimate fulfillment in this capacity to bless God, to know, so to speak, the meaning of the thirst and hunger that constitutes his life. “Homo sapiens” [“man the wise”], “homo faber” [“man the creator”] yes, but, first of all, “homo adorans.” The first, the basic definition of man is that he is the priest. He stands in the center of the world and unifies it in his act of blessing God, of both receiving the world from God and offering it to God–and by filling the world with this eucharist, he transforms his life, the one that he receives from the world, into life in God, into communion with Him. The world was created as the “matter,” the material of one all-embracing eucharist, and man was created as the priest of this cosmic sacrament.
Men understand all this instinctively if not rationally. Centuries of secularism have failed to transform eating into something strictly utilitarian. Food is still treated with reverence. A meal is still a rite–the last “natural sacrament” of family and friendship. of life that is more than “eating” and “drinking.” To eat is still something more than to maintain bodily functions. People may not understand what that “something more” is, but they nonetheless desire to celebrate it. They are still hungry and thirsty for sacramental life. [14-16]