Who said "The mind needs books as a sword needs a whetstone."?

This quote is attributed to Tyrion Lannister.

The mind needs books as a sword needs a whetstone. - Tyrion Lannister

"The mind needs books as a sword needs a whetstone."

Tyrion Lannister Education

Character in A Game of Thrones

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"A man's got to know his limitations."

"The gods flip a coin."

"That's what I do. I drink and I know things."

"Lannister always pays their debts."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."