When we call something unfair or indecent or unconscionable or evil, when we speak of mercy and pity and compassion, those words have meaning, regardless of our particular faith or moral philosophy. They appeal to common standards we all are expected to understand and accept, standards without which we could not live any common life at all.
Matthew Scully (2011). “Dominion: The Power of Man, the Suffering of Animals, and the Call to Mercy”, p.296, Souvenir Press