The Science of Being Great is from the author Wallace Delois Wattles (1860 - 1911), whose work inspired the cult-phenomenon book and film "The Secret". He was a widely popular and pioneering writer in the self-help and success genres. According to Wattles there is a Principle of Power in every person. By the intelligent use and direction of this principle, man can develop his own mental faculties. Man has an inherent power by which he may grow in whatsoever direction he pleases, and there does not appear to be any limit to the possibilities of his growth.