Who said "Gratitude opens doors that fear has locked shut."?

This quote is attributed to Oberyn Martell.

Gratitude opens doors that fear has locked shut. - Oberyn Martell

"Gratitude opens doors that fear has locked shut."

Oberyn Martell Gratitude

"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."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"