Instruct: Classify a given Amazon review as either positive or negative.
Query: Articulated essence

As a veteran of over a dozen 100 mile trail runs myself, I can say that this wonderfully written book was truly the best book on the sport of ultrarunning I have ever read. Among a lot of things, it came closest to answering the most often question that is asked about ultrarunning: "Why would one ever run one of these things?" Beyond that, it went to the core of the rewards of self-understanding that one can obtain by pushing one's self the edge of emotional, psychological, and physiological exhaustion. It's a wonderful story about the importance to look at life from a perspective of things that really matter that, as it turns out, are the simple things all around us all the time. Best book I have read in awhile that stays in your thoughts for a long time after the book is done. Trust me, read it, and then sign up for Badwater or the Hardrock 100 to find your soul and spirit too. This is a great book!