Who said "Fear is the prison we build ourselves; courage is the key."?

This quote is attributed to Skanderbeg.

Fear is the prison we build ourselves; courage is the key. - Skanderbeg

"Fear is the prison we build ourselves; courage is the key."

Skanderbeg Fear

Military Commander Albanian 1405–1468

"I am the son of my efforts."

"A man without courage is not a man."

"Freedom is the greatest treasure."

"I fight not for gold, but for my people."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."