Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A religious experience

I've only read the first chapter of this book, but it's been completely fantastic so far. In just one chapter, Spivak's dispatched many of the nagging questions that I'd had about basic mathematics (Why exactly is 1/0 undefined?)To some of the negative reviewers, this book has to be read in the right "frame of mind." I made several false starts before it "clicked."I recommend reading "Lockhart's Lament" before reading this book. Lockhart's Lament is available freely from the AMA. That's what helped me understand what Spivak was doing and why all of the really dumb seeming basic questions were actually important.Not a book to skim. Consider yourself warned.