Maurice Harker explains the importance of having your own strength when it comes to relationships. Just like rock climbing each spouse needs to have their own safety harness.
https://www.lifechangingservices.org/lazaruslectures (for both)
https://www.lifechangingservices.org/wmrw/(for wives)
https://www.lifechangingservices.org/mmrw/ (for husbands)