Who said "A man must master his demons or be mastered by them."?

This quote is attributed to Batman.

A man must master his demons or be mastered by them. - Batman

"A man must master his demons or be mastered by them."

Batman

"It's not who I am underneath, but what I do that defines me."

"Fear is a tool. When that light hits the sky, it's not just a call. It's a warning."

"Criminals thrive on the indulgence of society's understanding."

"I have not come to fight men. I have come to save them."