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

This quote is attributed to Iron Fist.

The hardest battles are fought within ourselves. - Iron Fist

"The hardest battles are fought within ourselves."

Iron Fist Courage

"I am the living weapon. I am Iron Fist."

"I've trained my entire life for this moment."

"The chi flows through all living things."

"I need to protect the innocent."

"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."