Divorce Preparation for Catholics?

From the Chaplain’s Laptop: Divorce Preparation

For the rest, those called to the married state, a lifetime of happy marriage awaits them. They have only to follow the rules. They prepare for marriage by learning to pray alone and together, by sharpening their minds and their bodies for the contests ahead, and by assimilating the patrimonies of art and science. No one expects perfect happiness in their marriages, and they know grave marriage problems are always possible. But the smiles and lightness of foot among these couples lift us all up.

No mention of sex differences or roles.