Discontent is what fuels growth — in marriage, in oneself, and in institutions. It’s what propels you to come up with creative solutions and to seek novelty and change. Merely accepting this represents a huge step in keeping a marriage alive and frees you to move onward, out of the dark side.
— Ellyn Bader and Peter T. Pearson, Tell Me No Lies: How to Stop Lying to Your Partner — And Yourself — In the 4 Stages of Marriage, p. 81