a. One force is the partition of the first level in the middle line, which is Ze’er Anpin.This partition reduces the level of Ḥokhma in the left line from the level of the first three of Ḥokhma to the lower height of six extremities of Ḥokhma. This is so that the Ḥokhma will not spread in order to illuminate from above to below but will illuminate from below to above, since this illumination is considered only six extremities of Ḥokhma.
b. The other force is the fusion through collision of the supernal light, which occurs upon this partition of the first level, drawing a height of the light of giving.