He said that my reason was the demon that kept me chained, an that I had to vanquish it if I wanted to achieve the realization of his teachings. The issue, therefore, had been how to vanquish my reason. It had never occurred to me to press him for a definition of what he meant by reason. I presumed all along that he meant the capacity for comprehending, inferring or thinking, in an orderly, rational way. From what la Gorda had said, I know that to him reason meant attention. (Ring, 274)

What Don Juan had struggled to vanquish, or rather to suppress in me, was not my reason as the capacity of rational though, but my “attention of the tonal,” or my awareness of the world of common sense. (Ring, 275)

Once the warrior is confronted with his incapacity to reason everything out, he will go out of his way to bolster and defend his defeated reason, and to that effect he will rally everything he’s got around it. The teacher sees to that by hammering him mercilessly until all his view of the world is on one half of his bubble. The other half of the bubble, the one that has been cleared, can then be claimed by something sorcerer call will.
Half of the bubble is the ultimate center of reason, the tonal. The other half is the ultimate center of will, the nagual. That is the order that should prevail…any other arrangement…goes against our nature–it robs us our magical heritage and reduces us to nothing. (Power, 254)

Sorcerers believe that reason is only one center and that it shouldn’t take so much for granted. (Power, 255)

Reason + nagual + will (Power, 276)