Short Excerpt: "Of the incorporeal beings, only angels fell away, and not all of them, but some only, that inclined to things below and set their desire on things of earth, withdrawing themselves from their relations with things above, even from God."

Short Excerpt: “‘When men multiplied on the earth, the angels of heaven came together with the daughters of men.’

In some copies I found “the sons of God”. What is meant by the Spirit, in my opinion, is that the descendants of Seth are called the sons of God on account of the righteous men and patriarchs who have sprung from him, even down to the Saviour Himself; but that the descendants of Cain are named the seed of men, as having nothing divine in them, on account of the wickedness of their race and the inequality of their nature, being a mixed people, and having stirred the indignation of God.

But if it is thought that these refer to angels, we must take them to be those who deal with magic and jugglery, who taught the women the motions of the stars and the knowledge of things celestial, by whose power they conceived the giants as their children, by whom wickedness came to its height on the earth, until God decreed that the whole race of the living should perish in their impiety by the deluge.”

Short Excerpt: "For of the spirits who inhabit the heaven, the angels who dwell in the lowest region, being grieved at the ingratitude of men to God, asked that they might come into the life of men, that, really becoming men, by more intercourse they might convict those who had acted ungratefully towards Him, and might subject every one to adequate punishment...

But when, having assumed these forms, they convicted as covetous those who stole them, and changed themselves into the nature of men, in order that, living holily, and showing the possibility of so living, they might subject the ungrateful to punishment, yet having become in all respects men, they also partook of human lust, and being brought under its subjection they fell into cohabitation with women; and being involved with them, and sunk into defilement and altogether emptied of their power, were unable to turn back to the first purity of their proper nature, their members turned away from their fiery substance: for the fire itself, being exhausted by the weight of lust, and changed into flesh, they trode the impious path downward. For they themselves, being fettered with bonds of flesh, were constrained and strongly bound; wherefore they have no more been able to ascend into the heavens... "

Short Excerpt: “When, therefore, the number of men had begun to increase, God in His forethought, lest the devil, to whom from the beginning He had given power over the earth, should by his subtlety either corrupt or destroy men, as he had done at first, sent angels for the protection and improvement of the human race; and inasmuch as He had given these a free will, He enjoined them above all things not to defile themselves with contamination from the earth, and thus lose the dignity of their heavenly nature.

He plainly prohibited them from doing that which He knew that they would do, that they might entertain no hope of pardon.

Therefore, while they abode among men, that most deceitful ruler of the earth, by his very association, gradually enticed them to vices, and polluted them by intercourse with women. Then, not being admitted into heaven on account of the sins into which they had plunged themselves, they fell to the earth.“

Short Excerpt: "And this argument is still further confirmed by Plutarch, in the passage where he says that the mythical narratives told as concerning gods are certain tales about daemons, and the deeds of Giants and Titans celebrated in song among the Greeks are also stories about daemons, intended to suggest a new phase of thought. Of this kind then perhaps were the statements in the Sacred Scripture concerning the giants before the Mood[flood], and those concerning their progenitors, of whom it is said, 'And when the angels of God saw the daughters of men that they were fair, they took unto them wives of all that they chose,' and of these were born 'the giants the men of renown which were of old.'

For one might say that these daemons are those giants, and that their spirits have been deified by the subsequent generations of men, and that their battles, and their quarrels among themselves, and their wars are the subjects of these legends that are told as of gods. Plutarch indeed, in the discourse which he composed On Isis and the gods of the Egyptians, speaks as follows word for word:

'THEY therefore do better who think that the incidents recorded concerning Typhon and Osiris and Isis refer to sufferings neither of gods nor of men, but of certain mighty daemons... For various degrees of virtue and vice are found in daemons just as in men.’
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Short Excerpt: When Almighty God, to beautify the nature of the world, willed that that earth should be visited by angels, when they were sent down they despised His laws. Such was the beauty of women, that it turned them aside; so that, being contaminated, they could not return to heaven. Rebels from God, they uttered words against Him. Then the Highest uttered His judgment against them; and from their seed giants are said to have been born.

By them arts were made known in the earth, and they taught the dyeing of wool, and everything which is done; and to them, when they died, men erected images.

But the Almighty, because they were of an evil seed, did not approve that, when dead, they should be brought back from death. Whence wandering they now subvert many bodies, and it is such as these especially that ye this day worship and pray to as gods.

Short Excerpt: “When by this time the human race had increased to a great multitude, certain angels, whose habitation was in heaven, were captivated by the appearance of some beautiful virgins, and cherished illicit desires after them, so much so, that falling beneath their own proper nature and origin, they left the higher regions of which they were inhabitants, and allied themselves in earthly marriages.

These angels gradually spreading wicked habits, corrupted the human family, and from their alliance giants are said to have sprung, for the mixture with them of beings of a different nature, as a matter of course, gave birth to monsters.

God being offended by these things, and especially by the wickedness of mankind, which had gone beyond measure, had determined to destroy the whole human race."

Short Excerpt: He called the sons of Seth sons of God, those who, like the sons of Seth, had been called “the righteous people of God . The beautiful daughters of men whom they saw were the daughters of Cain who adorned themselves and became a snare to the eyes of the sons of Seth.

Then Moses said, they took to wife such of them as they chose, because when they took them, they acted very haughtily over those whom they chose, A poor one would exalt himself over the wife of a rich man and an old man would sin with one who was young. The ugliest of all would act arrogantly over the most beautiful.