The entire descent and dispersion of the Light from Above downward is intended to reveal the intentions, which are the heads (Roshim) of spiritual actions (Partzufim). These heads of the Partzufim are the Creator’s thoughts. In essence, they comprise the chain that spans from the World of Infinity down to this world.
Following all the actions, after the Light descends from Above downward, the heads of the spiritual Partzufim remain together with the Reshimot (information records). Here is where we can independently use these actions to connect to the heads of the spiritual Partzufim to bring about our ascent.
From the Lesson 7/2/10, Baal HaSulam, Talmud Eser Sefirot