And in order that the dispute between right and left should not arise again, the middle line rises from below and unites the right and left so that they will illuminate together, with the Ḥokhma in the left enclothed in the light of giving in the right, and the light of giving in the right incorporated in the Ḥokhma in the left (as explained in section 37, above). Then the brains illuminate in all their perfection, at which stage they are called “the brains of the front.” It has now been explained how, as a result of the conflict between the right and left of the brains of the back, the three aspects of gestation, infancy and the brains of the face, emerge again.
Balancing Chesed and Gevurah in the Divine
Introduction to Sulam Commentary 81:2