While Tesla was doing experiments in 1893, he believed it could be possible to photograph thoughts. He conceived of reflecting an image on taking a photograph and projecting the image on a screen. Back then, the inventor said: “If this can be done successfully, then the objects imagined by a person would be reflected on the screen as they are formed,” he said, “and in this way, every thought of the individual could be read. Our minds would then, indeed, be like open books.” Decades later, Tesla stated: “I became convinced that a definite image formed in thought must, by reflex action, produce a corresponding image on the retina, which might possibly be read by suitable apparatus.”