Who said "War taught me that humans are capable of anything."?

This quote is attributed to Punisher.

War taught me that humans are capable of anything. - Punisher

"War taught me that humans are capable of anything."

Punisher War

"I'm not going to save you. I'm going to kill you."

"Vengeance is a lazy form of grief."

"One batch, two batch, penny and dime."

"You don't get to quit when things get hard."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."