In plain words
The Self, the one reality, lights up the intellect and the other faculties, as a lamp lights up pots and other things. Those faculties have no light of their own, and they can never light up the Self. Understand this.
Word for word
Understand that the one reality, the Self, illumines the faculties beginning with intellect as a lamp illumines pots and other things; the Self is never illumined by those faculties, which have no light of their own.