xactly!" Dr. von Stein took no offense. "And a difference between the mind and the radio set is that with the radio you tune in upon whatever you choose, and when you choose. The mind is not under such control, although it should be. It receives that to which it happens to be open. Or that thought which has been intensified and strengthened by having been received and entertained by other minds. In India they say: 'Five thousand died of the plague and fifty thousand died of fear.' Do you both follow me?"
It was unnecessary to ask. Betty sat on the edge of the couch, intent upon every word. Parker, although more restrained, was equally interested. Moreover he was delighted to have what he had felt instinctively confirmed, in a way, by a man of science.
"Herbert Spencer said," continued the doctor, "that no thought, no feeling, is ever manifested save as the result of a physical force. This principle will before long be a scientific commonplace. And Huxley predicted that we would arrive at a mechanical equivalent of consciousness. But I will not attempt to bolster my position with authorities. I know, and I can prove what I know.
"You, Mr. Parker, have been receiving some particularly annoying thoughts which have been intensified, it may be, by others, or another. Human will power can alter the rate of vibration of the line of force, or etheric wave. So-called good thoughts have a high rate of vibration, and those which are called bad ordinarily have a low rate. Have you, perhaps, an enemy?"
"Not that I know of," replied Parker, in a low voice.
"Then it would follow that this is accidental."
ood heavens! Do you mean to say that someone could do this to me maliciously?"