Who said "To serve oneself is the highest calling."?

This quote is attributed to Lannister.

To serve oneself is the highest calling. - Lannister

"To serve oneself is the highest calling."

Lannister Philosophy

"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."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."