"A mind needs books as a sword needs a whetstone, if it is to keep its edge."
— Tyrion Lannister
A Mind Needs Books As A
A mind needs books as a sword needs a whetstone, if it is to keep its edge.
About this quote
Tyrion Lannister (Peter Dinklage) quotes this line from a book by Samwell Tarly in Season 1, Episode 2 ("The Kingsroad") of Game of Thrones, adapted from George R.R. Martin's novel A Game of Thrones. He offers it to Jon Snow as advice on how to survive in a world that will define him by his bastard status. In the source novel, the quote about books and whetstones is spoken by Tyrion to Jon during their journey north.
Source
Game of Thrones, Season 1, Episode 2