This is its irreplaceable significance in a romantic partnership — it is not the entirety of the relationship, but it is the most honest yardstick for measuring its genuine depth. When this bridge of undercurrents stands firm, couples possess the foundation to weather all the storms of life. But when it fractures or becomes blocked, even the most outwardly splendid relationship will, over the long years, wither away, having lost its most authentic mode of dialogue.