How do the Atoms attract each other and move together? There is an evidence of Force and Energy here that is not Heat, Light or Electricity--what is it? When a man wishes to close his hand, he Wills that it be closed, and sends a current of this Finer Force of the Mind along the nerve to the muscle, and the latter contracts and the hand is closed. A similar process is used in every muscular action. _What is the Force used?_ Science admits the existence of this Force, and calls it "Nervous Energy," or "Nerve Force." It holds that it must be something like Electricity, and some even go so far as to say that it _is_ Electricity. They base their ideas upon the fact that when Electricity is applied to the muscle of living or dead animals, they contract just as they do when this "Nerve Force" is applied, and every movement of the muscles may be so produced by Electricity, which becomes a counterfeit Nerve Force. But, here is the point, this Force cannot be identical with Electricity, _for none of the appliances for registering electric currents will register it_. It is not Electricity, _but is some Finer Force of the Mind_, generated in the material substratum that the Mind uses as a base of operation. This Fine Force of the Mind is generated in some way in the Brain and Nervous System, by action upon the Psychoplasm. The Brain, or brains (for Man has several centres worthy of that term) are like great dynamos and storehouses of this Force, and the nerves are the wires that carry it to all parts of the system. More than this, the nerves have been found to be generators of Force, also, as well as the Brain. Experiments have shown that the supply of Force in a nerve vanishes when the nerve is used, in which case it draws upon the storehouses for an additional supply. This Fine Force of the Mind is really the source of All Energy, for as we have shown in previous chapters, all Motion arises from Mental Action, and this form of Force or Energy is the primal Force or Energy produced by the Mind. And this Force is in operation in all forms of Life, from the Atom to the Man. And not only may it be used by the Particle, but Man, also, has it at his disposal. As a proof that Substance is "used-up," and Energy manifested in the production of Thought, Science points to the fact that the temperature of a nerve rises when it is used, and the temperature of the Brain increases when it is used for extended Thought. Scientists have claimed, and advanced a mass of proof to back up the same, that Thought was as much a form of Energy as was the pulling of a train of cars, and was attended by the production of a definite amount of Heat, resulting from the activity of the fine substance of the physical extended resistant and composite substratum.