Unless God is on the balance and throws his weight as a counterbalance, we shall sink to the bottom of the scale. If it is not true that God died for us, but only a man died, we are lost. But if God's death and God lie dead in the opposite scale, then his side goes down and we go upward like a light or empty pan. But he could not have sat in the pan unless he became a man like us, so that it could be said: God dead, God's passion, God's blood, God's death.
Martin Luther, quoted in the Formula of Concord
From Christiainty Today Online