I see the same essential marriage advice given time and time again: “be self-giving, not self-seeking”. Depending on who you listen to, and in what context, the message ranges from the quite helpful to the incredibly toxic.
It can push for balance and mutuality — if both spouses seek the other’s wellbeing, then both will also be on the receiving end and good things tend to happen. But it can also give the impression that marriage is about work or indeed ‘sanctifying’ your spouse. Throw in false assumptions about what men and women need for their well-being (e.g. women need security, men need sex) and it’s a recipe for abuse.
That said, it’s hard for Christians to shake the feeling that marriage is about more than one individual and that marriage shouldn’t come at the expense of one spouse. So, you can see why Christians might encourage self-giving rather than self-seeking for good marital relations.
But I think this approach is fundamentally flawed.