The metaphor of a marriage is used to explain the unification of Zeir Anpin and Malchut.
The ultimate mating, the joining of our world of Malchut with Heaven - the realm of Zeir Anpin - occurs as our eyes wed with the letters that speak this wisdom. In turn, our own sexual relations with our spouse are imbued with holiness, generating for us divine pleasure and fulfillment.
Once again, the healing forces associated with the Sh'ma Yisrael prayer now remedy and regenerate the 248 parts of our body and soul. Moreover, sharing this Light with our fellow man while we meditate upon verses 336 and 337 heals the collective body and soul of man.
Verse 337 interweaves Judgment with Mercy so that leniency and great compassion mark our Final Redemption - both personally and globally.