Who said "The greatest weapon is knowledge of one's enemy."?

This quote is attributed to Littlefinger.

The greatest weapon is knowledge of one's enemy. - Littlefinger

"The greatest weapon is knowledge of one's enemy."

Littlefinger Wisdom

"Chaos isn't a pit. Chaos is a ladder."

"Knowledge is power, but power without wisdom is destruction."

"The world is not kind to those who hesitate."

"A man with no debts is a man with no leverage."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."