Who said "I've learned that mercy is a luxury I can't afford."?

This quote is attributed to Moon Knight.

I've learned that mercy is a luxury I can't afford. - Moon Knight

"I've learned that mercy is a luxury I can't afford."

Moon Knight Justice

"I'm not sick. I'm not crazy. I'm just awake."

"The only way to deal with the darkness is to become the darkness."

"We all have our demons. Mine just happen to be more literal."

"Sleep is for people without problems."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."