Answer: Inside the connection with the neighbor, this world—the world of separation and its perception—is annihilated. I, who am an egoist, and this world that divides us vanish from my consciousness and sensation when I reach the right connection with the neighbor.
After all, the world is your sensation when you feel only your self. If instead of this you start to feel the neighbor more, then this world gradually disappears. Instead of it, you begin to feel the Upper World.
From the lesson in Moscow on 1/14/11, The Zohar