If we call homosexual union “a marriage,” then we need another word for this: God’s design for one man and one woman to reflect the harmonized diversity within God’s one essence and to reflect the creative power of that unity.
The Biblical definition of marriage is much more than a legally recognized relationship of emotional and sexual attachment. Marriage was designed to reflect the very nature of God.
God’s image is uniquely reflected in the union of male and female because the fullness of the Godhead encompases both expressions. It is ironic that the homosexual community promotes the word “diversity” because a core problem with homosexual union is its lack of that very thing. The beauty of both musical and marital harmony lies in the rich complementing of differing notes and genders, not identical ones.
Why did God create Eve from the side of Adam? There was purpose in that: since Eve came from Adam, their union was able to represent oneness instead of “twoness.”