Mind obeys the law of action and re-action. 107 



energy have also been discovered by actual experi- 

 ment and measurement. A pound weight falling 

 through 772 feet gives forth as much energy as would 

 (in the form of heat) raise the temperature of one 

 pound of water one Fahrenheit degree. We know 

 that so much mechanical power is equal also to so 

 much electric current, chemical action, &c., and a 

 large amount of evidence exists to show that these 

 transformations of energy occur in all the organs of 

 living creatures, and in obedience to the law of their 

 equivalents. How far mental power is a " mode of 

 energy " transformable, and obedient to the laws of 

 equivalence, are interesting questions for future 

 research. 



The mechanical principle of action and reaction is 

 another which can be traced in mental as well as in 

 physical phenomena. Mental excitement is often 

 succeeded by mental depression, " after pleasure 

 follows pain." The power of mental self-guidance 

 and self-education is largely dependent upon the two 

 well known scientific principles of latent energy, and - 

 action and reaction. We are able to liberate energy, 

 not only in cases where it will influence inanimate 

 matter but also ourselves. The principle of self- 

 guidance is not restricted to living creatures, nor is 

 self-regulation limited to mental power. The prin- 

 ciple of self-regulation operates in clocks, watcher, 

 musical boxes, the governors of steam engines, water 

 regulators, gas regulators, &c., &c., and upon an 

 immense scale in the movements of the heavenly 



