Martin Luther King, Jr., did not come preaching something new. He came shouting something we already knew: "You have said in your own Declaration of Independence that we hold these truths to be self-evident, that all are created equal, and I insist that you either live by your own constitution or appear bafflingly inconsistent." And we killed him, because King told us what we already knew. He preached our sermon. Others have preached to us, but King preached for us.