84. What comprises a medium per se is the mediumistic faculty, which may be more developed or less so; what comprises the sure medium, the one who can truly be classified as a good medium, is the use of the faculty, the aptitude to serve as an interpreter for good spirits. Regardless of the faculty, a medium's ability to attract good spirits and repel evil ones is due to his or her moral ascendancy. This ascendancy is in proportion to the sum of the characteristics that make such mediums moral persons, and with it they obtain the affinity of good spirits and exert control over evil ones.
