A few years ago, I was your average person, not too happy not too sad I was never the optimist until I have read this book. The book was recommended by a friend of mine to me, I saw the powerful effect it had on him and decided to convince myself. This book has life changing capabilities. For me, it was increased positive thinking, confidence, and also set up a kind of new mentality, one that I'm glad I posses now, and in general made me feel like a much better person. This book has 'steps' that really work and are not just a bunch of logic that seems correct. It reinforces certain concepts which overall lead to a better life, at least in my opinion. I would highly recommend this book to everyone, I'm sure everyone can also use more positive thinking, happy or sad, there are no exceptions to who this book can help. If it changed my life, it can most certainly change yours.