As Rabbi Yosi opens the discussion of this difficult verse, we learn that the images of Isaac and Rivkah were exactly the same as the images of Abraham and Sarah, in both physical and spiritual terms. The rabbis then reveal the hidden meaning in the stories of the patriarchs. They all lived, we are told, by the secret of Zeir Anpin, and thus each had four wives representing the Sfirot of Chochmah, Binah, Tiferet, and Malchut of the Nukva of Zeir Anpin. The entire physical world of the patriarchs was designed to mirror the structure and form of the spiritual dimension, thereby creating affinity and attachment to the Light of the Creator. Finally, we hear Rabbi Shimon's succinct explanation of the secret of holiness, and how all mysteries are really one secret, included within the secret of the Nukva of Zeir Anpin alone.
Succeeding generations of mankind are not on the same spiritual level as the patriarchs. Nevertheless, we can still create affinity and attachment to their world and its superior spiritual structure, through the mystical words that bespeak their wonders, a privilege afforded to us through a thoughtful reading of this passage. This attachment invokes the Light of Creator, removing darkness and iniquity from our existence.