In this text, harmony in music becomes a symbol for human coexistence, in harmony with nature. Music becomes the key for a change in the modern world - a return to a life "as it used to be". The treatise encourages a new life in harmony with nature and fellow human beings, helping each other in a peaceful community. If people can develop freely according to their wishes and contribute their individual abilities to living together, a basis for a new society close to nature will emerge.