The Nephilim walked into history in Genesis 6:4, which runs, “The Nephilim were on the earth in 
those days—and also afterward—when the sons of God went to the daughters of men and had children by them. They were the heroes of old, men of renown.” The Nephilim are mentioned once more, as the terrifying inhabitants of Canaan (in reality, the ancestors of the prodigiously-sized Anakites; whether they have any connection with such groups as the Rephaites is more than I can say).
The actual importance of the Nephilim, in theology, religion, and the arc of the Bible’s narrative, is slight; their fascination is large. Their close connection to the much-disputed “sons of God” entrenches them in controversy; their association with the outsized denizens of Canaan increases the intrigue. Their name means “fallen ones,” and Nephilim is frequently translated giants, including in such venerable translations as the King James Version, the Geneva Bible, and the Wycliffe Bible. (The Geneva Bible also provides the alternate word tyrants.) Giants, fallen ones, heroes of old, men of renown – wouldn’t you love to know more about them?
One ancient, and still popular, interpretation of the Nephilim – it appears in the Book of Enoch, written before the birth of Christ – holds that they were the children of fallen angels and human women. For obvious reasons, this interpretation is the one that prevails in Christian speculative fiction. It’s not that the writers necessarily believe it, any more than sci-fi writers necessarily believe that it’s possible to go back in time or to travel faster than the speed of light; it’s just that it’s that sort of idea. The idea is acutely uncomfortable. But ideas often are in a genre that takes, for its parents, people like Edgar Allan Poe and the Brothers Grimm.
What sets the Nephilim apart from other ideas is that they are derived from the Bible. Nobody really cares whether it’s possible to go back in time when reading (or writing) time-travel stories. Nobody ever liked Star Wars less because some scientist debunked lightsabers on the grounds that that’s not how lasers work. We’re all happy to set aside debates and, for the sake of our chosen stories, presume what we suspect to be false. But should we have a different standard when the debates are centered around Scripture?
This question goes beyond the Nephilim and, if you care to follow it, wanders into all sorts of nuance. Is it all right to write a novel where the rumor is true and the Apostle John never dies? (This, too, happens in Christian speculative fiction.) Can we say that Daniel founded a school of astrology that eventually trained the Magi, though we know in our hearts that never happened? Can we have time-travelers at the Crucifixion? Can we have the Nephilim after all? Are the answers to all these questions conditional on the details, on what we do with the premise more than what the premise is? Is it simply a matter of staying in the gray and not infringing on the black and white? (For example: We can say the Nephilim were giants or tyrants or angel-human hybrids because that argument has been going on for centuries, but we can’t say they caused the Flood because they didn’t, and if you don’t believe me, read Genesis 6 past verse 4.)
What do you think? What sort of lines have you drawn, in your reading or writing?
