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.
