Sometimes in history the name of God has been invoked on behalf of actions and movements that have ennobled the human soul and lifted the body politic to a higher plane. Take the Reverend Martin Luther King, Jr., and the American civil rights movement, or Archbishop Desmond Tutu and the struggle against South African apartheid, as examples. Other times religious fervor has been employed for the worst kinds of sectarian and violent purposes. The Ku Klux Klan, the troubles in Northern Ireland, the wars in the former Yugoslavia, and David Koresh's Branch Davidian standoff in Waco, Texas, are frightening examples.Is there a reliable guide to when we are really hearing the voice of God, or just a self-interested or even quite ungodly voice in the language of heaven? I think there is. Who speaks for God? When the voice of God is invoked on behalf of those who have no voice, it is time to listen. But when the name of God is used to benefit the interests of those who are speaking, it is time to be very careful.