Food for thought on Satanic beliefs regarding power gained from negative energy. Humans emit electromagnetic energy. Positive when we are happy and healthy; negative when we are sad, sick, lonely, scared or depressed. Masses of suffering people are essentially a giant battery feeding the Satanic need for negative energy. If you have the ability to lift a fellow human out of despair, you are contributing to the bigger fight against evil in this world.
I don`t know the one you are referencing but there is much info to be found if you search it (duckduckgo) and you can probably find "The Secret" in your local library; that is a very quick read and simple language.