Thomas Edison is one of those great minds who, appearing in known periods of time among mankind, mark a whole new era in the development of a particular branch of science and technology. It is impossible to apply to him the standard that is usually used in evaluating many outstanding personalities; in their special mental strength and almost superhuman talents, people like him stand apart, representing amazing phenomena that have not yet been sufficiently studied by science.
Book Edison: His Life and Inventions (by Frank Lewis Dyer)
