Genesis 6:4

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 bare children to them, the same became mighty men which were of old, men of renown. The conditions before the Flood are further characterized. Wild, lawless men, tyrants there were on the earth in those days, offspring of marriages that did not meet with God's approval, children of wild passion, men that defied order and authority and became mighty men, whose names were mentioned with bated breath as those of unparalleled champions and heroes. The whole earth was full of outrage and violence. Cf Matthew 24:38. This is a picture of our own days, of the period immediately preceding the final Judgment, full of the most impressive warning for all that will heed the signs of the times.