Unity with God and His will:  A vow, integral unity with His will.

It's the vow that John wants to split. 

But marriage is a call, a vocation, demanding totality of gift: holiness.

Seeking His will before we choose our own happiness, even in the apparent antagonism of our happiness.

The work of a life time.

The universal call to holiness (Vatican II point). 

The art of holiness.  "Sculpting the stone of our hearts" (JPII)

The Church wrote the Catechism...you refuse to listen to that one too, long before you ran across me!

Every year, a new excuse.