There's no way to put a limit on what one may accomplish individually if the intent is an impeccable intent. Don Juan's teachings are not spiritual. I repeat this because the question has come to the surface over and over. The idea of spirituality doesn't fit with the iron discipline of a warrior. The most important thing for a shaman like don Juan is the idea of pragmatism.
Carlos CastanedaThe third point of reference is freedom of perception; it is intent; it is spirit; the somersault of thought into the miraculous; the act of reaching beyond our boundaries and touching the inconceivable.
Carlos CastanedaIntent is not a thought, or an object, or a wish. Intent is what can make a man succeed when his thoughts tell him that he is defeated. It operates in spite of the warrior's indulgence. Intent is what makes him invulnerable. Intent is what sends a shaman through a wall, through space, to infinity.
Carlos CastanedaA hunter that is worth his salt does not catch game because he sets his traps, or because he knows the hunting routines of his prey, but because he himself has no routines. This is his advantage. He is not at all like the animals he is after, fixed by heavy routines and predictable quirks; he is free, fluid, unpredictable
Carlos Castaneda