Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ever hear of helping people?!?

The title basically says it all. Ringer is saying that there is no reason to do something nice for someone unless you get something in return..."Simply stated, don't do something for the reason that it's 'the right thing to do' if there is no benefit to be derived from it." (page 88). In other words don't volunteer or help another person in any way. If you are looking for a GOOD book read "Perpetual Motivation" by Dave Durand. I have listened to him speak before and he's great. THAT book will change your life not some selfish book where you only look out for yourself.