The views advanced in this book differ materially from any of those above mentioned, it being held by the writer that "All Force is Vital-Mental Force," and, consequently, "Force" as a separate thing is considered an unreasonable proposition--what is called "Force" being considered merely an action of Mind upon Substance, causing Motion. The writer does not intend to advance this idea at this point beyond the mere mentioning of the fact--the theory being brought out and developed as we proceed--and he will proceed to a consideration of the phenomena of Force, along the lines of Modern Science, believing that in this way the subject may be better understood. The term "Motion," as used in Physics, is defined as: "The act, process or state of changing place or position; movement"--(Webster). So you see, Motion is the movement of Substance changing place or position; Force is that which causes, changes or terminates Motion; and Energy is the "capacity" for manifesting Force; and Power the Ability to Act. In works on Physics you will notice the expression, "Potential Energy," meaning Energy awaiting action; also "Kinetic Energy," meaning Energy in Action; that is, in Motion. We shall not need these terms in this book, but it is well to understand them. Another term frequently met with, is "Conservation of Energy," which is used to indicate that Law of Physics the operation of which renders Energy indestructible. That is, Science holds that Energy can not be destroyed--that it is not lost, or created, but is merely transformed into other forms of Energy, Potential or Kinetic. Therefore, after Energy is used, it either passes into a state of Potential Energy or Rest, awaiting a future call to Activity, or else is immediately transformed into another form of Kinetic Energy, or Energy in Action. The theory holds that the quantity or amount of Energy in the Universe is fixed in its totality--none may be created or destroyed--there can be no addition to, or subtraction from the Totality of Energy--that all Energy used has been previously stored up, or else has been immediately transmitted or transformed. It is also held that when Energy manifests as the result of work performed, it is always found that it is at the expense of some previously manifested form of Energy--that the agency by which the work is performed always parts with its stock of Energy, and that the thing worked upon always acquires or gains the amount of Energy lost by the aforesaid agent, or worker--and yet there is no actual loss or gain, but merely transformation.