Youths that cannot be underestimated

Think defeat and you've lost. Believe victory and you've won. Youths that cannot be underestimated. Their eyes remain clear even when they are surrounded by piles of bones. You are as strong as you believe. Youths that cannot be underestimated. If evil creatures are the conduits of darkness and despair, then we are the hope of defense against darkness. The youths that cannot be underestimated.