13 Would you like me to illustrate this argument in the case of whole nations? What great forethought was bestowed upon the Jewish nation! Was not the whole visible creation arranged with a view to their service? Was not a new and strange method of life introduced among them? For they had not to send down to a market, and so they had the benefit of things which are sold for money without paying any price for them: neither did they cleave furrows nor drag a plough, nor harrow the ground, nor cast in seed, nor had they need of rain and wind, and annual seasons, nor sunshine, nor phases of the moon, nor climate, nor anything of that kind; they prepared no threshing floor, they threshed no grain, they used no winnowing fan for separating the grain from the chaff, they turned no mill-stone, they built no oven, they brought neither wood nor fire into the house, they needed no baker's art, they handled no spade, they sharpened no sickle, they required no other art, I mean of weaving or building or supplying shoes: but the word of God was everything to them.
And they had a table prepared off hand, free of all toil and labour. For such was the nature of the manna; it was new and fresh, nowhere costing them any trouble, nor straining them by labour. And their clothes, and shoes, and even their physical frame forgot their natural infirmity: for the former did not wear out in the course of so long a time nor did their feet swell although they made such long marches. Of physicians, and medicine, and all other concern about that kind of art, there was no mention at all among them; so completely banished was infirmity of every kind: for it is said “He brought them out with silver and gold; and there was not one feeble person among their tribes.” But like men who had quitted this world, and were transplanted to another and a better one, even so did they eat and drink, neither did the sun's ray when it waxed hot smite their heads; for the cloud parted them from the fiery beam, hovering all round them, and serving like a portable shelter for the whole body of the people.
Neither at night did they need a torch to disperse the darkness, but they had the pillar of fire, a source of unspeakable light, supplying two wants, one by its shining, the other by directing the course of their journey; for it was not only luminous, but also conducted that countless host along the wilderness with more certainty than any human guide. And they journeyed not only upon land but also upon sea as if it had been dry land; and they made an audacious experiment upon the laws of nature by treading upon that angry sea, marching through it as if it had been the hard and resisting surface of a rock; and indeed when they placed their feet upon it the element became like solid earth, and gently sloping plains and fields; but when it received their enemies it wrought after the nature of sea; and to the Israelites indeed it served as a chariot, but to their enemies it became a grave; conveying the former across with ease, but drowning the latter with great violence.
And the disorderly flood of water displayed the good order and subordination which marks reasonable and highly intelligent men, fulfilling the part at one time of a guardian, at another of an executioner, and exhibiting these opposites together on one day. What shall one say of the rocks which gave forth streams of water? What of the clouds of birds which covered the whole face of the earth by the number of their carcasses? What of the wonders in Egypt? What of the marvels in the wilderness?
What of the triumphs and bloodless victories? For they subdued those who opposed them like men keeping holiday rather than making war. And they vanquished their own masters without the use of arms; and overcame those who fought with them after they left Egypt by means of singing and music; and what they did was a festival rather than a campaign, a religious ceremony rather than a battle. For all these wonders took place not merely for the purpose of supplying their need, but also that the people might preserve more accurately the doctrine which Moses inculcated of the knowledge of God; and voices proclaiming the presence of their Master were uttered on all sides of them.
For the sea loudly declared this, by becoming a road for them to march upon, and then turning into sea again: and the waters of the Nile uttered this voice when they were converted into the nature of blood; and the frogs, and the great army of locusts, and the caterpillar and blight declared the same thing to all the people; and the wonders in the desert, the manna, the pillar of fire, the cloud, the quails, and all the other incidents served them as a book, and writing which could never be effaced, echoing daily in their memory and resounding in their mind.
Nevertheless after such great and remarkable providence, after all those unspeakable benefits, after such mighty miracles, after care indescribable, after continual teaching, after instruction by means of speech, and admonition by means of deeds, after glorious victories, after extraordinary triumphs, after abundant supply of food, after the plentiful production of water, after the ineffable glory with which they were invested in the eyes of the human race, being ungrateful and senseless they worshipped a calf, and paid reverence to the head of a bull, even when the memorials of God's benefits in Egypt were fresh in their minds, and they were still in actual enjoyment of many more.
Source: No One Can Harm the Man Who Does Not Injure Himself (New Advent)