Answer: "One man with one heart" is already a correction which we can achieve only if the Creator is revealed. He performs this correction on us. How can people who are still in “Egypt,” in their egoistic desire, be obliged to unite like one man with one heart?
If I am still immersed into my egoism and I have not yet escaped from Pharaoh, haven’t risen above my ego, how can I unite with others like one man? I escape from Egypt with the help of the Light, due to my desire to come out from there, to jump out of my ego! There is one point in me with which I wish to come out and to which I wish to relate, to identify myself only with it. I wish to connect to others only through these points. For now I merely want this, but I am not in this yet.
We run for salvation together. However, there is no unification between us yet; this whole escape is carried out with the force from Above. We do not understand that we are not doing anything on our own yet. We are only preparing ourselves as much as possible.
It is written: “And the sons of Israel cried out from this work!” We are standing in front of Pharaoh and the Egyptian plagues, and there is no way out: These blows come to us and help us separate from our ego. Who suffers from these blows? The Pharaoh within us, our egoism, does. And I have suffered so much from it that I am willing to break away from it.
Imagine what will happen if some Egyptian plagues befall our world and there will be nothing to eat or drink, no air to breathe—it will be impossible to receive anything if we act egoistically! And then there will be no choice but to run away, not knowing where, into darkness, with closed eyes, only to be saved from a completely hopeless state. We have destroyed Earth and human society and reached a state where every living moment causes terrible pain. It is then that we are ready to run.
For now it is only a general run for the sake of salvation, and not unity. We understand that we need to unite as one man with one heart, but for the time being we are unable to imagine what that is. In order to understand this, we will still need to reach Mount Sinai (the mountain of hatred) and go through the Final Sea (Yam Suf) on the way.
From the 1st part of the Daily Kabbalah Lesson 4/10/2011, Writings of Rabash