As Lavelle rightly pointed out, the best books do not reveal something unknown to us, but something we already know intimately and which, due to a sudden illumination, we seem to discover. The best books, then, only shed light on something hidden inside us. The curious thing about this is that the sensation of discovering something we already know makes a very strong impression on our minds, much greater than learning something really new and unknown. And at the same time as we immediately identify with the idea, we also immediately establish a point of contact with the author.