When men began to increase in number on the earth and daughters were born to them, the sons of God saw that the daughters of men were beautiful, and they married any of them they chose. (Genesis 6:1–2, NIV 1984).
My Musings – Various interpretations of this text have been proposed, including that the “sons of God” were angels. This, of course, would be contrary to Jesus’ teaching that “when the dead rise, they will neither marry nor be given in marriage; they will be like the angels in heaven.” (Mark 12:25, NIV 1984). That is, angels do not marry. The interpretation that resonates most with me is that “the sons of God” were descendants of the Godly line of Seth and the “daughters of men” were descendants of the unGodly line of Cain. This, of course, would be consistent with Paul’s teaching to “not be yoked together with unbelievers. For what do righteousness and wickedness have in common?” (2 Corinthians 6:14, NIV 1984).
My Advice – This does not mean that Christians are not to associate with non-Christians. “My prayer is not that you take them out of the world but that you protect them from the evil one. They are not of the world, even as I am not of it. Sanctify them by the truth; your word is truth. As you sent me into the world, I have sent them into the world.” (John 17:15–18, NIV 1984). God has “sent [us] into the world” to reach the lost. The sacred purpose (Great Commission) for which we have been set apart (sanctified). Not to be yoked (to become attached) to the world, to which we “have [nothing] in common.“
Go into the world, but do not become part of the world.