We celebrated our 19th anniversary last May. The minister who married us talked to us ahead of the wedding about choice and intention. And that if we went into the marriage with the intention that 'we would give this a try and see how it worked' that it wouldn't last ten years; but if we went in with the intention that 'we would last forever' that we would make it 'to death do us part'. The other thing he talked to us about was choice. When you marry you are making a choice. And each day of your marriage is a choice. You can choose each other every day, or you can choose something else. Choosing each other is the only way it works.
It hasn't all been honeymoon, but to this day I wake up every morning knowing that I would choose him all over again. Even during the really rough spots, we actively chose each other, every day. Our choosing, plus our intention keeps the spark alive and our kids telling us to 'get a room' LOL
Besides, we each think that we are the lucky one!