“The greatest discovery and development of the coming years will be along spiritual lines. Here is a force which history clearly teaches has been the greatest power in the development of man and history, and yet we have been merely playing with it and have never seriously studied it as we have physical forces. Some day people will learn that material things do not bring happiness and are of little use in making men and women creative and powerful. Then the scientists of the world will turn their laboratories over to the study of the spiritual forces. When this day comes, the world will see more advancement in one generation than it has in the past four.”

 Charles Proteus Steinmetz, Inventor of the Alternating-Current Motor

It seems to me that Charles Stinmetz's predictions are coming true, what is Lester Levenson' s teaching but a scientific study of spiritual forces.