“This book will not harm you unless someone throws it at you which is a possibilty never to be discounted.”
“The first rule of being a ninja is, 'Do no harm.' Unless you mean to do harm. Then do lots of harm.”
“You cannot do harm to someone because someone has done harm to you. You will pay just like they will.”
“You can never escape me. Bullets don't harm me. Nothing harms me. But I know pain. I KNOW pain. Sometimes I share it. With someone like you.”
“You have not lived a perfect day, unless you've done something for someone who will never be able to repay you.”
“Sometimes, you read a book and it fills you with this weird evangelical zeal, and you become convinced that the shattered world will never be put back together unless and until all living humans read the book.”