Context: After Adam and Eve, the first of mankind, had been driven from Eden because of their disobedience to God, they established their home under the hard conditions imposed by God and began to rear children, as they had been commanded. In time the world was heavily populated with several clans and cultures of people. Cain, after having been exiled to the region of Nod for killing his brother, became the ancestor of numerous descendants, distinguished for their worldliness. From another son of Adam, Seth, developed a line distinguished for its pastoral simplicity and religiosity. By and large men were becoming more and more evil, however. "The sons of God," probably referring to those who had not forgotten the tradition of their fathers, were taking the fair daughters of men as wives, from which union came children who grew into mighty men, "which were of old, men of renown." Whether these are the giants of the earth or whether the giants refer to another people the theologians cannot agree. The verse reads:
There were giants in the earth in those days; and also after that, when the sons of God come in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.