Baal HaSulam, Letter No. 13: You should believe that there are plenty of sparks of bestowal in each friend, and if we gather them all in one place, in brotherly unity, love, and friendship, of course, it would be enough to reach a significant spiritual level now and for life.
Nothing was created in the world but one soul. The parts, sparks, of that one soul wake up from generation to generation and achieve correction. All the generations, which have completed their correction, unite in the last generation, which begins with us.
Our generation is special. It should connect within itself all the previous generations: from Adam HaRishon, through Abraham and Rabbi Shimon, the Ari, and Baal HaSulam who have performed big corrections in one soul and have prepared its significant, special, and lightest part for us. But besides that, we must connect to ourselves all the future vessels or desires (Kelim) that complete correction.
We connect within ourselves those who are behind us, our forefathers, and those who are ahead of us, our sons, all of them together. We have reached the condition when the world begins to demand correction; souls begin to awaken. And although people do not understand this, it is not necessary because they belong to the part of the collective soul that reaches correction unconsciously, thanks to the connection with us.
Our duty is to unite, to connect within ourselves all the holy sparks of bestowal, which corrected this system before us—and to complete correction.
This is an extraordinary time; we feel that this is a special state. And we see how the Creator helps us, that is, makes it possible for us to unite and purify ourselves so that what we desire so much becomes realized.
From Lesson 1, Arvut Convention at the Arava Desert 11/18/2011