pages 125-126 paperback
"We are beings on our way to dying," he said. "We are not immortal, but we behave as if we were. This is the flaw that brings us down as individuals and will bring us down as a species someday."
Don Juan stated that the sorcerer's advantage over their average fellow men is that sorcerers know that they are beings on their way to dying and they don't let themselves deviate from that knowledge. He emphasized that an enormous effort must be employed in order to elicit and maintain this knowledge as a total certainty.
"Why is it so hard for us to admit something that is so truthful?" I asked, bewildered by the magnitude of our internal contradiction.
"It's really not man's fault," he said in a conciliatory tone. "Someday, I'll tell you more about the forces that drive a man to act like an ass."