7. Therefore,12This point returns to the middle of the previous section, explaining the logic as to why the returning light was only able to serve as complete vessels for the direct light below the partition and not above it. the ten sefirot of the direct light and the ten sefirot of the returning light had to spread from the partition and downward. The reason is that it was at that point that the ten sefirot of the returning light became vessels that receive and enclothe the ten sefirot of the direct light. At this stage, the partition is already positioned above the ten sefirot of the returning light, and therefore its opacity controls the ten sefirot of the returning light, and it is through this positioning that they are formed into vessels.
Returning Light Below the Parsa and Above It
Introduction to Sulam Commentary 7:1