" The only reason you helped me out was because I’m a tortoise and my tormentors were children. To intervene between a tortoise and children isn’t likely to bring about much in the way of repercussions. What did you give them—five coppers? That’s big money to a child, but it’s not much skin off your back, is it? I thought you’d put up a bit more than that. Miserly isn’t the word. How do you think it makes me feel? Five coppers for my life. For you it was just a whim of the moment. ‘A few coppers to rescue a tortoise—oh, hell, why not?’ But suppose it wasn’t children teasing a tortoise but, say, a group of rowdy fishermen tormenting some sickly beggar. Would you have offered so much as a single copper? Hardly. You would have scowled and hurried past, not wanting to get involved. "
― Osamu Dazai , Otogizōshi: The Fairy Tale Book of Dazai Osamu