Katherine Boo said this quote

Water and ice made of the same thing. He thought most people were made of the same thing, too...If he had sort all the humanity by its material essence, he thought he would probably end up with a single gigantic pile. But here was the interesting thing. Ice was distinct from - and in his view, better than - what it was made of.He wanted to be better than what he was made of. In Mumbai's dirty water, he wanted to be ice. He wanted to have ideals. For self-interested reasons, one of the ideals he most wanted to have was a belief in the possibility of justice.