In the days of Noah and afterward, fallen angels fathered hybrid creatures called Nephilim. The genetic mingling of demonic and human could not be tolerated in the days of Noah or when the Israelites came into Canaan. God spoke of giants whose height was like cedar trees, Moses spoke of King Og who was fifteen feet tall! The mystery of the Nephilim is the key to unlock Jesus' phrase "as it was in the days of Noah, so the coming of the Son of Man will be."