People have been thinking for thousands of years. Why do we suddenly need a book to tell us how to think?
People have been running, too, for thousands of years. But if you want to be in the Olympics, it’s generally a good idea to get a coach.
Most of us can think really well about one or two parts of a problem at any given moment. The challenge is that most problems are more complicated than that, and what might seem like a good solution at first can end up spawning all kinds of other problems we didn’t expect. Brilliant thinking is meant to take our good thinking abilities and use them to completely think through really complex problems — so we can come up with creations and solutions that we’ll be happy about not only today but five years from now.