Who said "The measure of a man is not his birth, but his will."?

This quote is attributed to Lannister.

The measure of a man is not his birth, but his will. - Lannister

"The measure of a man is not his birth, but his will."

Lannister Strength

"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."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."