I persist in fighting because I see something that's wrong, and the alternative to fighting is to submit." Cain made no comment. "If you want a philo… - Mike Resnick

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I persist in fighting because I see something that's wrong, and the alternative to fighting is to submit."
Cain made no comment.
"If you want a philosophic justification, you'll find it in my library," continued Santiago. "I've got a much simpler explanation."
"What is it?"
He smiled a savage smile. "When someone pushes me, I push back.