Accountability.

I had not paid attention to it, but once Don Juan made me aware of it, I also noticed an incredible silence in the desert around the house.

"Don't get jumpy," he said calmly.  "There is nothing in this world that a warrior cannot account for.  You see, a warrior considers himself already dead, so there is nothing for him to lose.  The worst has already happened to him, therefore he's clear and calm; judging him by his acts or by his words, one would never suspect that he has witnessed everything."

                                                         -   Tales of Power by Carlos Castaneda.