Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Delusions of grandeur

Maybe, like me, you figured that a bike messenger is basically a kind of freelance corporate errand boy. Not that there's anything wrong with that: somebody has to hustle all that corporate paper around from one office building to the next, lest the wheels of finance begin to slow. Well, imagine my surprise at what I learned from this book: bike messengers are not mere errand boys on wheels after all. Turns out that they are members of a noble aristocracy called "The Immortal Class," whose selfless, heroically athletic feats of downtown daring-do are actually all about saving the environment, resisting the dehumanizing forces of capitalism, sticking it to The Man, living free and unencumbered by square values and bourgeois hang-ups, and just generally existing on a higher spiritual plane than the two-legged dullards who do not partake of the "Cult of Human Power." Ya learn something every day.