Who said "I have learned to trust only myself."?

This quote is attributed to Lannister.

I have learned to trust only myself. - Lannister

"I have learned to trust only myself."

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."