Yuusuke Urameshi — memorable quote from Yu Yu Hakusho: Ghost Files

“You were wrong on two counts. Even the hardest substance can be broken, when crashed into itself. And the ability to feel pain is not a weakness. It’s a strength. Pain tells a creature its vulnerabilities, and not you expose them to attack. Your robot is dead. And so, I’m afraid, are you.”

“You cannot go into battle believing you will lose.”

“It's a battle of life and death, and I'm still alive! So I'm not going to give up, and I'll keep living. I'll keep living until I die.”

“The lesson you need to learn right now, can't be taught with words... only with action.”

“Are our enemies the kobolds? No, our real enemies are our overly weak selves.”