As it is the woman and the man who marry  each other in a Catholic service, with the priest being the official witness of the church, the onus is clearly on them to carry this relationship forward.  No one, at this precious juncture in their lives, would envision anything less than the ideal: "We shall love each other all the days of our lives."  But that is the ideal, and then, life happens sometimes to make that man and woman look at each other differently.  That Francis understands that the  complexities, the vicissitudes of  life can intrude on the best intentions of a couple and change forever their original commitment to each other is a heartening sign, not one to be dismayed about.  Only in God is there no change.  Understanding ought to be the watchword of an enlightened age and a Christ-like Pope.