Accordingly, one must always distinguish between two forces in the partition:
The first is hardness (kashyut), which constitutes the force of rejection inherent to it to be able to rebuff the supernal light.
The second is opacity (ovyut), which is the measure of the will to receive that is incorporated within the partition from the fourth level. By means of the fusion through collision as a result of the force of hardness that the partition contains, the opacity is purified.25The opacity refers to the will to receive, which separates the fourth level from the Creator, who is wholly giving. After the supernal light was rejected and returned, this refusal allowed the fourth to ultimately receive the supernal light, because that receiving actually constitutes a gift to the Creator by providing Him with a receiver. This is called a “purification” of the initial separation, or opacity. That is, there is the transformation of receiving into giving.