This is very important because the corrections are performed from the lightest to the most difficult. The light layers of the broken vessel have already been corrected in previous generations, while in our generation we begin to correct the lowest, thickest, and worst layer to which we ourselves belong.
The general desire is divided into five levels (0-4) of Aviut, or “thickness,” depth of the desire. In the drawing, they are marked on the time axis according to which we perform our correction, from the lightest to the most difficult one, as said before. The principle of the “descent of the generations” stems from this: Each generation is worse than the previous one in terms of its ego. As a result, we advance from the lightest Reshimot (reminiscences) to the most difficult ones.
Today we have reached the final stage of the generation of Mashiach (Messiah): the correction of the last layers of the desire to receive. Of course, this is difficult. The world is immersed in the ego, people are unable to be considerate of one another, they distance from one another: a person from a person, a man from a woman, and children from parents. Countries, nations—everything is falling apart, disintegrating.
So it says: “The essence of prophetic success is to extend the upper Light to the dwellers below. The one who brings it lowest is the most successful.” And so we should “descend” to the masses, not only to those who lead a good life, but also people who have the worst attributes and the greatest resistance. We are trying to reach everyone and to convey our message to them, considering, of course, the circumstances in each place.
Our success depends on this. It is measured namely by how deep we can dive. Baal HaSulam writes about this in “Introduction to The Book of Zohar,” Item 63: “Thus, in our generation, although the essence of the souls is the worst, which is why they could not be selected for Kedusha thus far, they are the ones that complete the Partzuf of the world and the Partzuf of the souls with respect to the Kelim, and the work completed only through them.”
From the Preparation for the Daily Kabbalah Lesson 4/11/2012