Let's at least try & breakdown that key, by paying attention to partners who were actually able to maintain a healthy relationship & keep a positive attitude even after years of marriage, & that too, to the same individual. Though it seems like a miracle, it is still possible, offered you are willing to put in an effort & work on your wedding. Of course, what may, do, the key to success for some may not necessarily work for others, but one can always improvise, right?