President Henry B. Eyring wrote this beautiful talk talking about the joys of family life and the righteousness of it. He talks about how it is because of the Priesthood Power that families are sealed together and strengthened. He goes on to talk about how husbands and wives take turn to carry each other through different unplanned trials that pop up in their married lives. The only way we can be happy as one is by not being easily offended at the other person.
https://www.lds.org/liahona/2015/06/families-can-be-together-forever?lang=eng
https://www.lds.org/liahona/2015/06/families-can-be-together-forever?lang=eng