There are some business men who look upon psychology as "blue-sky" theorizing or "new thought." There are others who have a hazy idea that it is a sort of unfathomable mystery intended to amuse long-haired scientists. The truth is that every one of these same business men, if he is getting ahead, is unconsciously using psychological principles to the profit of his own business every day in the year. [Sidenote: _Devices for Commercial Efficiency_] In the books that are to follow we shall show you the immense practical value of a truly scientific psychology. You shall come into the psychological laboratory with us and work out rational, scientific and exact methods by which, without possibility of failure and with but reasonable effort, you can at any moment completely concentrate your mental powers. You shall be instructed in simple devices for mastering scattered energies, repressing wasteful habits, banishing depressive moods and raising yourself to a far higher level of commercial efficiency. End of Project Gutenberg's Initiative Psychic Energy, by Warren Hilton