“The people of Israel will not return to their land until they are completely united.” The people of Israel are a group that Abraham once organized by selecting them from among the Babylonians. He wanted to correct the whole world but managed to gather just a few thousand people in this group.
However, the Torah does not speak about historical events, rather about internal states through which a person passes. The property of Abraham within us takes a part of our desires and leads them to a partial correction, and then to a shattering (a fall of the Temple, or descent from the spiritual level to exile).
Exiles are required in order for desires that have been in spirituality (Israel), to mix with the rest of desires that did not go through spiritual ascent and shattering (called “nations of the world”). After mixing together and becoming included in one another, all of them are prepared for corrections. In other words, everyone now has a part that has been in spirituality, and a part that hasn’t.
Those who went through the ascent and shattering must be the first to undergo corrections because they contain Reshimot (data about previous states). After this others will awaken. Everyone must come to understand that the “Israel” within, meaning the desires aspiring to the Creator, will not attain their land (Eretz) or corrected “desire (Ratzon) “straight to the Creator” (Isra-El), in which the Creator becomes revealed, until they all unite to become “as one man with one heart.”
This is the requirement Kabbalists tell us about. We must implement it in a small part of the soul inside each of us, as well as in a big part of the soul among all Kabbalah groups in the world, and in yet an even bigger part of the soul, which includes all of humanity. Thus, this necessary requirement begins to be realized starting from a very material level.
From the 3rd part of the Daily Kabbalah Lesson 4/6/10, “Inheritance of the Land”