Who said "The greatest battles are fought within ourselves."?

This quote is attributed to Aquaman.

The greatest battles are fought within ourselves. - Aquaman

"The greatest battles are fought within ourselves."

Aquaman Courage

"I'm not the king of the seas. I'm the protector of it."

"You can't run from who you are."

"The ocean doesn't judge. It just exists."

"Being a hero isn't about the power you have. It's about what you do with it."

"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."