Who said "The hardest battles are the ones within yourself."?

This quote is attributed to Billy Batson.

The hardest battles are the ones within yourself. - Billy Batson

"The hardest battles are the ones within yourself."

Billy Batson Courage

"Shazam!"

"I'm just a kid who got struck by lightning and can turn into an adult superhero. How cool is that?"

"With great power comes great responsibility."

"Sometimes the greatest strength comes from believing in yourself."

"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."