But I donโt think Iโve ever known such a natural at Potions!โ said Slughorn. โInstinctive, you know โ like his mother! Iโve only ever taught a few with this kind of ability, I can tell you that, Sybill โ why even Severus โโ And to Harryโs horror, Slughorn threw out an arm and seemed to scoop Snape out of thin air toward them.
J. K. RowlingChildren'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. Rowling