We try to organize our live experiences so they make sense. We impose our mode of perception onto individuals, objects and draw associations denoting what is equivalent and contrastive. For Brendon, his world was organized to reject meaning. The world around him affirmed the truth of emptiness. He strove for abstraction - there was nothing concrete hence there was little or shifting meaning. Meaning, meaning, meaning. What did it mean? Nothing more than a word.
Unbelieve. Destroy those same organizing principles and linkages. To unbelieve was to achieve something beyond a paradigm shift - it reached into the emotional realm. Faith is a tenuous thing. Previously Brendon had allowed the world to impose itself on him. Now Brendon had to pick up the pieces responsibly and reassemble a coherent picture for himself.