Who said "To survive, one must be willing to become a monster."?

This quote is attributed to Moriarty.

To survive, one must be willing to become a monster. - Moriarty

"To survive, one must be willing to become a monster."

Moriarty Perseverance

"You see, but you do not observe. The distinction is quite clear."

"I am not a puzzle to be solved; I am the one who solves."

"The world is full of obvious things which no one by any chance ever observes."

"Crime is common. Logic is rare."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."