Who said "You are not a good man. I know this."?

This quote is attributed to Lannister.

You are not a good man. I know this. - Lannister

"You are not a good man. I know this."

Lannister Truth

"A Lannister always pays his debts."

"I am the god of tits and wine."

"You are an awful man."

"I drink and I know things."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."