A clever Satan has deceived people into almost every other belief about God. He was in the beginning with God. He existed with God. And he, also, was God. They both coexisted forever.
Marriage is a physical union but a divine institution.
It is not of man's devising. And the word became flesh and dwelt among Us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth. This, of course, is speaking of Jesus Christ. In the human flesh, he was begotten of God the Father, the only one ever so begotten before human birth. And the wife is to be composed of born children of God.