There are two steps along our ascent to the spiritual world, and the first one is to obtain a desire (Hissaron). In our corporeal world, we are born with a desire to reveal this world and to rule, take advantage of, and connect with it. But in the spiritual world, it is different since we need to earn this desire.
It is the Light that helps us with this. We use it to arrange our egoistic desire in an opposite, altruistic form that enables us to obtain the desire for bestowal, that is, a spiritual Kli (a spiritual vessel is a desire to bestow).
In our world, we are given the desire to receive, understand, and feel. Likewise, in the spiritual world, there is a desire to bestow, love, connect, and unite. How are we able to obtain it? Clearly, we can receive it only from the Light that Reforms and nothing else. And for this we need at least some initial desire to receive the Light’s impact. This tiny initial desire is called free will which is given to us in a very simple and distinct form: as one singular point that we can find and discern within our current state.
This can be achieved solely through the connection between us and our collective effort, provided that we have the desire to bond and depend on each other. If such relationships are found between the souls (or people that carry them), then according to our efforts, the Light reveals itself, begins to give us a new desire, and passes its own desire to us.
This is the only real work that a person has as Baal HaSulam explains it in his article “The Freedom”: We need to exert the minimum effort, in a selective, narrow, and clear-cut direction in relation to the environment, and as a result of the measure of this exertion, the Light descends upon us. It clarifies our desires (their opposite side), gives us the sensation of a lack, according to which we reveal all the holy names of the Creator until the full revelation of the Light (all the names of the Creator).
Thus, a person attains a spiritual state where “Israel (the soul yearning for the Creator), the Torah, and the Creator become one,” meaning all of man’s desires become equivalent to the Light that reformed them. Through these sacred names a person attains all the general Light called the Torah and the Creator (the purpose of creation “to delight the creatures”) which is revealed in this Light.
All this is revealed within a person’s desire. The Torah is the revelation of the spiritual world attained through a person’s individual, partial revelation of the Creator’s names.
From the 1st part of the Daily Kabbalah Lesson 8/11/10, “You Should Always Discern Between Torah and Work”