How Did David Deutsch Change Your Life?

When did you discover the work of David Deutsch, and how did it influence your worldview? I discovered him through a friend of my mill's baker who has a really lovely blog full of wonderful essays online. He sent me an email that said, Andy, this is incredibly urgent. I need to send you a book today because I think this book solves basically all of the problems that you and I have been discussing politically, artistically, philosophically. It contained a lot of fundamental answers to questions of purpose, meaning, power, the role of the self which were very novel to me.