Our whole life is permeated with sounds, with music. The quality of music is a very important factor on which the further course of evolution directly depends. What is the quality of the music that constantly accompanies our lives: in stores, in cafes, from televisions and radios? Music can heal or it can literally destroy. This collection of articles reveals secrets of music. Having knowledge of the effects of music on us and on our environment, we can consciously apply this knowledge and drastically change our lives!