Baal HaSulam, Fruit of the Wise, Letter 13: You should know that there are many sparks of sanctity in each person in the group. When you collect all the sparks of sanctity into one place, as brothers, with love and friendship, you will certainly have a very high level of sanctity from the Light of Life.
We lack only one thing: to bring our sparks closer together. There are no disturbances, no limitations—we should just glue ourselves into a single whole so as to flare up together.
Degel Machaneh Ephraim: It is good for Israel (those who yearn for the Creator) to be always united as one group. When they unite below, they cause their root to unite Above too.
Then this root influences us and completes what we have started, as it says: “He who makes peace in the heights, will make peace upon us.” We raise a request for correction (MAN), awaken our desires from below, and then we receive the forces of connection from Above that complete the action.
So all that is required of us is “half a Shekel,” half of the action: to want unity. The connection will be realized from Above, when our demand is correct.
Rabash, “The Need for Love of Friends”: There is a special power in the adhesion of friends. Since views and thoughts pass from one to the other through the adhesion between them, each is mingled with the power of the other, and by that each person in the group has the power of the entire group.
Every individual is different from others, but the connection gives him the power of all the friends. Imagine what it’s like when everyone feels the power of all others. This is actually the power of Infinity. After all, we connect into a huge group of friends from all over the world. We don’t need anything but that.
No one has the power to enter even the first, smallest spiritual level by himself. Only when we connect in quantity and quality do we acquire the Lights of Nefesh, Ruach, Neshama, Haya, and Yechida and go through the worlds of Assiya, Yetzira, Beria, Atzilut, and Adam Kadmon on our way to the world of Infinity.
All the 125 degrees of the spiritual ascent are attained by the growing connection. In it, each time I find a special vessel that is capable of greater bestowal and accordingly, I discover a greater Light.
From Lesson 8, The World Arvut Convention 12/8/2011