"Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me." (Matt. 25:40)
Mind you, they aren't just asking "What is legal?" Like the question "Who is right?", the question "What is legal?" tends to obscure the more important question: "What is right?" The word "right" could also be substituted with the word "just", as in, "What is just?" This question, in turn, obviously begs the even more basic question, namely, "What is justice?" Like these good compatriots, philosophers have been grappling with this question for millennia. I won't attempt to answer it here.
But I will share a news report from the world of sports that could serve as an shining beacon to the world of politics. It is a story that provides an answer to the question "What is justice?" but more importantly it provides an answer to the question, "What is mercy?" Consider how some boys from the Queen Creek High School football team treated one of their sophomore classmates, a wonderful girl named Chy. (Special thanks to Professor Paul Seaton who shared this story with my dad, who in turn shared it with me).