Who said "The greatest battles are often internal, not external."?

This quote is attributed to Superman (2022).

The greatest battles are often internal, not external. - Superman (2022)

"The greatest battles are often internal, not external."

Superman (2022) Philosophy

"I'm not just a reporter anymore. I'm a father, and that changes everything."

"Being Superman doesn't make me invincible. It's the people I love that make me strong."

"The truth matters more than the story. Always."

"I've learned that power without purpose is just destruction."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."