Who said "Courage isn't the absence of doubt; it's action despite it."?

This quote is attributed to Aquaman (DCEU).

Courage isn't the absence of doubt; it's action despite it. - Aquaman (DCEU)

"Courage isn't the absence of doubt; it's action despite it."

Aquaman (DCEU) Courage

"I'm a king. Kings don't run."

"The surface world has much to learn about respect."

"My people have watched you from below for centuries."

"I didn't come here to fight you."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."