Nature is dual

Those who believe that they can perform marvels with only the force of the mind are completely mistaken, because everything in Nature is dual. 

To think that all the works of practical magic can be performed with only the force of the mind is as absurd as to think that a man can engender a child without touching a woman. To think that we can perform all types of esoteric works with only the mental force is as ridiculous as to believe that we can write a letter with only a pen and no paper, or to believe that we can have light with only electricity and without the bulb . Everything in this ardent creation is dual.