Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh. (Genesis 2:24)
When God engaged to create man and woman and to ordain the union of marriage, he didn’t roll the dice or draw straws or flip a coin as to how they might be related to each other. He patterned marriage very purposefully after the relationship between his Son and the church, which he had planned from all eternity.