Who said "I have learned that solitude is the price of greatness."?

This quote is attributed to Lannister.

I have learned that solitude is the price of greatness. - Lannister

"I have learned that solitude is the price of greatness."

Lannister Solitude

"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."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."