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 CastanedaAs long as a man feels that he is the most important thing in the world he cannot really appreciate the world around him.
Carlos CastanedaNothing can temper the spirit of a warrior as much as the challenge of dealing with impossible people in positions of power. Only under those conditions can warriors acquire the sobriety and serenity to withstand the pressure of the unknowable.
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