There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bore children to them, the same became mighty men which were of old, men of renown.
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Ambrose of Milan
AD 397
“The giants (Nephilim) were on the earth in those days.” The author of the divine Scripture does not mean that those giants must be considered, according to the tradition of poets, as sons of the earth but asserts that those whom he defines with such a name because of the extraordinary size of their body were generated by angels and women. And let us see whether by any chance the men who only take care of their body and not of their soul are similar to the Nephilim and at the same time to those giants who were born from the earth according to the tales of the poets and despised the authority of the gods by confiding in the hugeness of their body. Must we really consider as different from giants those men who, even though they are composed of body and soul, despise the most precious good of the soul, that is, the activity of the mind, and show themselves to be imitators of this flesh, as if confirming that they were heirs of their own mother’s foolishness. They only struggle in vain whe...
All that we indubitably know, from the authentic Scripture in the Hebrew and Christian traditions, is the fact that in the period before the flood there were many giants, all of whom belonged to the earthly city in human society, and that there were sons of God descended from Seth who abandoned their holiness and sank down into this city of men. There is nothing surprising in the fact that giants could be born from men like that. In any case, they were not all giants, even though there were more giants before the flood than in all subsequent ages. They served a divine purpose in that they reveal to anyone who is wise that mere bodily magnitude and might have no more value than bodily beauty.
Strength of arm, swiftness of foot and comeliness of body—the spoils of sickness and the plunder of time—also awaken pride in man, unaware as he is that “All flesh is grass and all the glory of man as the flower of the field. The grass is withered and the flower is fallen.” Such was the arrogance of the giants because of their strength. Such also was the Goddefying pride of the witless Goliath. Homily , Of Humility.
The house of Cain, because the earth had been cursed so as not to give them its strength, produced small harvests, deprived of its strength, just as it is today that some seeds, fruits and grasses give strength and some do not. Because at that time they were cursed and sons of the cursed and were dwelling in the land of curses, they would gather and eat produce that lacked nutrition, and those who ate these were without strength just like the food that they ate. As for the Sethites, on the other hand, because they were the descendants of the blessed [Seth] and were dwelling in the land along the boundary of the fence of paradise, their produce was abundant and full of strength. So too were the bodies of those who ate that produce strong and powerful. .
Giants. It is likely the generality of men before the flood were of a gigantic stature, in comparison with what men now are. But these here spoken of, are called giants, as being not only tall in stature, but violent and savage in their dispositions, and mere monsters of cruelty and lust. (Challoner)
Yet we need not imagine, that they were such as the poets describe, tearing up mountains, and hurling them against heaven. Being offspring of men, who had lived hitherto with great temperance, but now gave full scope to their passions, and the love of the fair daughters whom they chose, we need not wonder that they should be amazingly strong and violent. Nephilim, rushing on, as Ag. translates. That there have been giants of an unusual size, all historians testify. Og, Goliah are mentioned in Scripture, and the sons of Enac are represented as much above the common size, as the Hebrews were greater than grasshoppers, Numbers xiii. 34. If we should suppose they were four or five times our s...
