I had the same thought about the Gospel reading this Sunday that Derek did. I don’t know why it never struck me this way before – maybe it was the translation I was reading/hearing it in. But it sounds for all the world like Jesus is saying that his followers–“those who are considered worthy of a place in that age and in the resurrection from the dead”–don’t (shouldn’t?) marry. Although Jesus’ words elsewhere in the NT (not to mention his presence at/wine catering for the wedding at Cana) suggest a more positive view of marriage.
We’re familiar enough with the idea that Paul seems to give marriage only a grudging thumbs up. I wonder if this represents a wrestling with an earlier more stringent apocalyptic ethic in light of a delayed parousia?
Lutheranism has usually seen the institutions of the world as ordered toward human flourishing but also as provisional. Marriage would seem then to be part of the kingdom of the left and of the world that is passing away. This seems to me to argue for a more flexible approach to marriage – to being willing to tinker with the institution in light of new experiences. This would be in line with Paul’s seeming pragmatism (“it is better to marry than burn” etc.).