Who said "To persevere is to survive. To survive is to conquer."?

This quote is attributed to Drogon.

To persevere is to survive. To survive is to conquer. - Drogon

"To persevere is to survive. To survive is to conquer."

Drogon Perseverance

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."