9. Besides the moral question an effective consideration also presents itself which is no less important. This refers to the actual nature of the faculty itself. Serious mediumship cannot be, and never ever will be a profession; not just because it would be morally discredited and rapidly become mere fortunetelling; but because there is a material obstacle in opposition. Mediumship is a faculty which is essentially unstable, elusive, and variable, whose permanency no one can count upon. It is a very uncertain source for anyone wishing to exploit it, and can fail at the moment it is most needed. A talent acquired by study and work is another matter, and is for this very reason a skill which can be legitimately used to advantage. But mediumship is neither an art nor a skill; therefore it cannot become a profession. It only exists through the cooperation of the Spirits. If they are absent there is no mediumship. The aptitude can exist, but the exercise of it would be annulled. Also there is not a single medium in the world who can guarantee the obtaining of a spiritual phenomenon at any given moment. So then to exploit mediumship is to make use of something which does not really belong to that person. To state the contrary is to deceive the person being charged. What is more, it is not they themself whom the exploiter commands, but rather the concourse of Spirits, the souls of the dead, whose cooperation they put a price on. This idea causes instinctive repugnance. It was the trafficking, the exploitation by charlatans that degenerated into abuse, the ignorance, the incredulity and the superstition which motivated its prohibition by Moses. Modern Spiritism, understanding the serious nature of this question, has completely discredited this exploitation, so elevating mediumship to the category of a mission. (See THE MEDIUMS' BOOK, 2nd part, chapter 28 and also HEAVEN AND HELL, 1st part, chapter 11).