Read it through once

I have never seen any mesmeric or clairvoyant performances or spiritual manifestations which were in the least degree convincing—a fact which is not of consequence, since my opportunities have been meagre; but I am forced to believe that one human mind (still inhabiting the flesh) can communicate with another, over any sort of a distance, and without any _artificial_ preparation of ‘sympathetic conditions’ to act as a transmitting agent. I suppose that when the sympathetic conditions happen to exist the two minds communicate with each other, and that otherwise they don’t; and I suppose that if the sympathetic conditions could be kept up right along, the two minds would continue to correspond without limit as to time.