"A bad book is the worse that it cannot repent. It has not been the devil's policy to keep the masses of mankind in ignorance; but finding that they will read, he is doing all in his power to poison their books"

John Kenneth Galbraith's quote is a warning about the power of books. He is saying that a bad book is worse than one that can repent, since it can not be redeemed. He is also alerting that the devil is using books to spread his influence and poison the minds of the masses. He thinks that the devil is utilizing books to keep people in lack of knowledge, and that it is his policy to do so. This quote is a pointer that books can be powerful tools for both good and bad, and that we ought to be careful about what we checked out and take in. It is a reminder to be mindful of the books we select to read, and to be aware of the possible impact they can have on our lives.