Once a man worries, he clings to anything out of desperation; and once he clings he is bound to get exhausted or to exhaust whomever or whatever he is clinging to. A warrior-hunter, on the other hand, knows he will lure game into his traps over and over again, so he doesn't worry.
Carlos Castaneda (2009). “The Wheel Of Time: The Shamans Of Mexico Their Thoughts About Life De”, p.86, Simon and Schuster