It's a very powerful book and it will definitely bring tears to your eyes. In the book, he writes about how he lived his life and how he found his calling. He also went to business school, and this is what he thought of his fellow MBA candidates:

"Bottom line: they were extremely bright people who would never really do anything, would never add much to society, would leave no legacy behind. I found this terribly sad, in the way that wasted potential is always sad."

You can say that about all of us. And after he realized that in his thirties, he founded a company that turned him into a multi-millionaire.