In my youth I had the experience of meeting a scholarly Unitarian clergyman, the Rev. Minot J. Savage of New York, who assured me quite seriously that he had seen and talked with ghosts. He didn’t convince me, but he sowed the seed of curiosity in my mind, and I began reading books on psychic research. From first to last, I have read hundreds of volumes; always interested, and always uncertain—an uncomfortable mental state. The evidence in support of telepathy came to seem to me conclusive, yet it never quite became real to me. The consequences of belief would be so tremendous, the changes it would make in my view of the universe so revolutionary, that I didn’t believe, even when I said I did. But for thirty years the subject has been among the things I hoped to know about; and, as it happened, fate was planning to favor me. It sent me a wife who became interested, and who not merely investigated telepathy, but learned to practice it. For three years I watched and assisted in this work, day by day and night by night, in our home. So I could say that I was no longer guessing. Now I really know. I am going to tell you about it, and hope to convince you; but regardless of what anybody can say, there will never again be a doubt about it in my mind. I KNOW! _2_ Telepathy, or mind-reading: that is to say, can one human mind communicate with another human mind, except by the sense channels ordinarily known and used—seeing, hearing, feeling, tasting and touching? Can a thought or image in one mind be sent directly to another mind and there reproduced and recognized? If this can be done, how is it done? Is it some kind of vibration, going out from the brain, like radio broadcasting? Or is it some contact with a deeper level of mind, as bubbles on a stream have contact with the water of the stream? And if this power exists, can it be developed and used? Is it something that manifests itself now and then, like a lightning flash, over which we have no control? Or can we make the energy and store it, and use it regularly, as we have learned to do with the lightning which Franklin brought from the clouds? These are the questions; and the answers, as well as I can summarize them, are as follows: Telepathy is real; it does happen. Whatever may be the nature of the force, it has nothing to do with distance, for it works exactly as well over forty miles as over a few feet. And while it may be spontaneous and may depend upon a special endowment, it can be cultivated and used deliberately, as any other object of study, in physics and chemistry. The essential in this training is an art of mental concentration and auto-suggestion, which can be learned. I am going to tell you not merely what you can do, but how you can do it, so that if you have patience and real interest, you can make your own contribution to knowledge.