"We also read in the Testament, Genesis, chap. 6, verse 4, that giants were born when the sons of God came in unto the daughters of men: that is the very letter of the sacred text. Now, those giants were men of great stature, says Baruch, chap. 3, verse 26, and far superior to other men. Not only were they distinguished by their huge size, but also by their physical power, their plundering habits and their tyranny. Through their criminal excesses the Giants were the primary and principal cause of the Flood, according to Cornelius a Lapide, in his Commentary on Genesis. Some contend that by Sons of God are meant the sons of Seth, and by Daughters of men the daughters of Cain, because the former practiced piety, religion and every other virtue, whilst the descendants of Cain were quite the reverse; but, with all due deference to Chrysostom, Cyrillus, Hilarius and others who are of that opinion, it must be conceded that it clashes with the obvious meaning of the text. Scripture says, in fact, that of the conjunction of the above mentioned were born men of huge bodily size: consequently, those giants were not previously in existence, and if their birth was the result of that conjunction, it cannot be ascribed to the intercourse of the sons of Seth with the daughters of Cain, who being themselves of ordinary stature, could but procreate children of ordinary stature. Therefore, if the intercourse in question gave birth to beings of huge stature, the reason is that it was not the common connection between man and woman, but the performance of Incubi Demons who, from their nature, may very well be styled sons of God. Such is the opinion of the Platonist Philosophers and of Francis Georges the Venetian; nor is it discrepant from that of Josephus the Historian, Philo the Jew, S. Justinus the Martyr, Clement of Alexandria, and Tertullian, who look upon Incubi as corporeal Angels who have allowed themselves to fall into the sin of lewdness with women. Indeed, as shall be shown hereafter, though seemingly distinct, those two opinions are but one and the same." - Fr. Sinistrari of Ameno, par 32, www.gutenberg.org/cache/epub/54243/pg54243-images.html
