Definition: There are two forces always present in the Masach (screen):

There are two forces always present in the Masach (screen):
The first is Kashiut (hardness), the force of resistance to receiving Upper Light;

The second is Aviut (coarseness), the force of Behina Dalet’s 'desire to receive'. Because of Zivug de Aka'a (a Stroke Contact) of Kashiut with the Light, Aviut turns into Zakut (purity)m namely, reception turns into bestowal.

(Preface to the Wisdom of the Kabbalah, Item 18)

We have arrived at the time of actualization, so let us actualize what the Kabbalists wrote!