Whether consciously or not, sexist God language undermines the human equality of women made in the divine image and likeness. The result is broken community, human beings shaped by patterns of dominance and subordination with attendant violence and suffering. Idolatrous: insofar as male-dominant language is honored as the only or the supremely fitting way of speaking about God, it absolutizes a single set of metaphors and obscures the height and depth and length and breadth of divine mystery. Thus it does damage to the very truth of God that theology is supposed to cherish and promote.
