“We do not forget what we have elsewhere written about subjective and objective mediumistic phenomena. We keep the distinction always in mind. There are good and bad of both classes. An impure medium will attract to his impure inner self, the vicious, depraved, malignant influences as inevitably as one that is pure draws only those that are good and pure.
Of the latter kind of medium where can a nobler example be found than the gentle Baroness Adelma von Vay, of Austria (born Countess Wurmbrandt), who is described to us by a correspondent as “the Providence of her neighborhood”? She uses her mediumistic power to heal the sick and comfort the afflicted. To the rich she is a phenomenon; but to the poor a ministering angel.
For many years she has seen and recognized the nature-spirits or cosmic elementaries, and found them always friendly. But this was because she was a pure, good woman. Other correspondents of the Theosophical Society have not fared so well at the hands of these apish and impish beings. The Havanna case, elsewhere described, is an example.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 