Who said "To change the world, first change yourself."?

This quote is attributed to Oberyn Martell.

To change the world, first change yourself. - Oberyn Martell

"To change the world, first change yourself."

Oberyn Martell Change

"I am the viper. When the time comes, I will strike."

"Elia of Dorne. My sister. You raped her. You murdered her children."

"I want to look the man in the eye and see the fear in his heart."

"The man who passes the sentence should swing the sword."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."