It is enough if we desire to unite, and the Light will unify us. Each of us has a desire that has been evolving for thousands of years and a point that has emerged just now and is pulling us toward something unknown.
But it isn’t enough! We are dealing with a bipolar effect, a split desire: One part is pulling it to one side, this world, and the other, the “point in the heart,” pulls it in the opposite direction, to the spiritual world. What do I do with this bipolarity?
All you can do is override one desire with the other. This is why I enter the group and receive from it additional desire into the point in the heart. I obtain it thanks to the efforts I put into the group and due to the fact that I am not trying to break into the spiritual world, but rather act according to the rule of “from the love of friends to love for the Creator.” In other words, I put my efforts into our unified desire.
And then from the group, I receive the strength that includes the initial force of my point in the heart and what the group has added to it. This additional power that I receive is called “spiritual yearning” (Ishtotekut). And my initial desire is called Ratzon. Therefore, Kabbalists point out that in order to reach the upper world, it is necessary to have “Ratzon ve Ishtotekut” (see Part 1, Talmud Eser Sefirot).
The Upper Light acts upon this specific yearning built above my own natural desire and performs a correction within me: It unites me with the others into one collective desire, the place where the Creator will be revealed.
From the 4th part of the Daily Kabbalah Lesson 12/10/10, "The Freedom"