Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
The book changed my boundaries. I have become aware of my limitations and now I truly believe that these boundaries are not limitations but gifts in disguise. I realized the importance in one's short comings is the lesson that it presents for the seeker. Thank-you.
Answer:
Positive