…the highest duty of the Church is not to preserve institutions, but to be, simply and completely, good news. The gospel isn’t “good news/bad news” or “good news as long as you buy it properly.” It isn’t even “what would Jesus do?” It’s “What is Jesus actually doing through the whole creation, and trying to do through us if only we got real?”
Jesus referred marriage back to the way God actually made us. Marriage is a gift of God in creation that strengthens community and expresses divine love — that’s what’s meant by calling it “sacramental.”
In fact a very small but significant proportion of every human population is gay. If some of these people want to build stable faithful relationships based on love, that has to be a good thing. Love is love wherever it is found. We know it by its fruits, not its origins. But the fruits reveal the origin. God is love and those who live in love live in God and God lives in them. This is the good news.
Thus the prime question Christians have to ask is not “is the idea of ay marriage right or wrong?” but, whatever we make of the theory of the matter, “how can we be good news to the real human beings involved?”