Instruct: Classify a given review as either positive or negative.
Query: A true life-changer whose message is limitless

I can say about this book what I could not say about any other: it has been the source of my guidance in day to day life. It is beyond regular self help literature. Its message takes roots in one's inside so that changes in actions take place not due to one's will power but, instead, unconsciously. I would highly reccomend it to every and any body.Rodrigo Guimaraes Pinto