Children's books aren't textbooks. Their primary purpose isn't supposed to be "Pick this up and it will teach you this." It's not how literature should be. You probably do learn something from every book you pick up, but it might be simply how to laugh.
J. K. RowlingHarry, despite your privileged insight into Voldemortโs world (which, incidentally, is a gift any Death Eater would kill to have), you have never been seduced by the Dark Arts, never, even for a second, shown the slightest desire to become one of Voldemortโs followers!โ โOf course I havenโt!โ said Harry indignantly. โHe killed my mum and dad!โ โYou are protected, in short, by your ability to love!โ said Dumbledore loudly.
J. K. RowlingI remember every wand Iโve ever sold, Mr. Potter. Every single wand. It so happens that the phoenix whose tail feather is in your wand, gave another feather โ just one other. It is very curious indeed that you should be destined for this wand when its brother โ why, its brother gave you that scar.
J. K. Rowling