Quoting from chapter 56 of “Still Life With Woodpecker” by Tom Robbins:

Next, she thought, “When two people meet and fall in love, there’s a sudden rush of magic. Magic is just naturally present then. We tend to feed on that gratuitious magic without striving to make any more. One day we wake up and find that the magic is gone. We hustle to get it back, but by then it’s usually too late, we’ve used it up. What we have to do is work like hell at making additional magic right from the start. It’s hard work, especially when it seems superfluous or redundant, but if we can remember to do it, we greatly improve our chances of making love stay.” She was unsure if that idea was profound or trite. She was only sure that it mattered.