"those of the middle"

The Gospel of Truth (I 16, 31-43, 24) 17.4-35
... When the totality went about searching for the one from whom they had come forth - and the totality was inside of him, the incomprehensible, inconceivable one who is superior to every thought - ignorance of the Father brought about anguish and terror; and the anguish grew solid like a fog, so that no one was able to see. For this reason, error became powerful; it worked on its own matter foolishly, not having known the truth. It set about with a creation, preparing with power and beauty the substitute for the truth.
This was not, then, a humiliation for him, the incomprehensible, inconceivable one, for they were nothing, the anguish and the oblivion and the creature of deceit, while the established truth is immutable, imperturbable, perfect in beauty. For this reason, despise error.
Thus, it had no root; it fell into a fog regarding the Father, while it was involved in preparing works and oblivions and terrors, in order that by means of these it might entice those of the middle and capture them.