Who said "The only education that matters is the one paid in blood."?

This quote is attributed to Frank Castle.

The only education that matters is the one paid in blood. - Frank Castle

"The only education that matters is the one paid in blood."

Frank Castle Education

"Punishment is a language they understand."

"I'm not a hero. I'm a tool, sharpened and aimed."

"The only way to stop evil is to be better at it than they are."

"Mercy is for the living. The dead don't care."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."