6. As the primary context for our marriage apologetics shifts, we have the advantage of appealing more frequently and explicitly to some of our deepest, distinctively Christian, convictions about marriage.
In the more general cultural and political debate around marriage, in defending marriage we had to limit ourselves to secular categories and principles. While such defences are quite possible and still necessary—Christianity does not have any monopoly upon natural marriage—as the contrast between orthodox Christian understandings of marriage and those of the culture becomes sharper, we will spend more time defending marriage on our home turf. Here we have many more resources and arguments to call upon in its defence. We can make clear, for instance, that same-sex relations are an idolatrous distortion of the image of God—an offence directly against God and against human nature. We can also ground our defence of marriage upon the robust account of nature and teleology that exists within Christian orthodoxy.