Iain McGilchrist’s fascinating theory of brain hemisphere function (“God on the brain”, Christopher Jamison, 22 November) may provide a key to understanding the idea of “complementarity” in marriage (Austen Ivereigh’s report from Rome in the same issue).Our “left/logical/literal” and “right/creative/metaphoric” ways of thinking can also be linked to the “masculine” and “feminine” sides that we all have (which my intuition tells me is fuzzily true, even if it isn’t precisely). So rather than focus on physical male/female aspects of relationships, perhaps we should refocus (blurrily?) on balancing such “gender” approaches within ourselves (Jesus is surely our best example) and outwardly as