And what is true for human beings is true for every living thing: all organisms require alternating periods of growth and equilibrium. Any person or system exposed to ceaseless novelty and change risks falling into chaos; but one that is too rigid or static ceases to grow and eventually dies. This never-ending dance between change and stability is like the anchor and the waves. Adult relationships mirror these dynamics all too well. We seek a steady, reliable anchor in our partner. Yet at the same time we expect love to offer a transcendent experience that will allow us to soar beyond our ordinary lives. The challenge for modern couples lies in reconciling the need for what's safe and predictable with the wish to pursue what's exciting, mysterious, and awe-inspiring.