He fed them with manna, that they might receive spiritual food. In the book of Deuteronomy Moses says: He fed you with manna, which your fathers did not know, that you might understand that man will not live by bread alone but by every word of God coming from the mouth of God. He commanded them to love himself and trained them to practice righteousness toward their neighbor, so that man might not be unrighteous or unworthy of God. Through the Decalogue he prepared man for friendship with himself and for harmony with his neighbor. This was to man’s advantage, though God needed nothing from man. This raised man to glory, for it gave him what he did not have, friendship with God. But it brought no advantage to God, for God did not need man’s love. Man did not possess the glory of God, nor could he attain it by any other means than through obedience to God. This is why Moses said to the people: Choose life, that you may live and your descendants too; love the Lord your God, hear his voice and hold fast to him, for this is life for you and length of days.  This was the life that the Lord was preparing man to receive when he spoke in person and gave the words of the Decalogue for all alike to hear. These words remain with us as well; they were extended and amplified through his coming in the flesh, but not annulled.