The bad news first: almost everything you think you know about yourself is wrong. You’re not really human, you’re not rational, and you might not even be real. But the good news is that you are more amazing than you ever realised. You can outrun horses, read minds and intuit complex physics. Your age really is just a number, and you can train your mind to make you braver, kinder and happier. This chapter deals with the most mind-blowing creature on Earth: you.