The Eternal Marriage Bond

The Raavad explains had woman been created that from the earth as was man, they would have gone their separate and independent ways. Instead, Hashem created one from the other to demonstrate the need for them to live together as a single unit. This concept is reflected in the commentaries of the Ramban and Rav Samson Raphael Hirsch on the pasuk, "והיו לבשר אחד - And they shall become one flesh" (Bereishis 2:24), which explain that "one flesh" constitutes one mind, one heart, and one soul. Indeed, the Zohar teaches that before uniting in marriage, man and woman are each only a plag gufa, half of a person. Standing under the chuppah transforms two separate individuals into that single cohesive unit that Hashem intended. Maintaining that indivisibility, central to achieving a successful marriage, requires vigilant focus  on shalom bayis.