Philip Schaff, the distinguished nineteenth century church historian, calls the saying in our title "the watchword of Christian peacemakers" (History of the Christian Church
, Vol. 7, p. 650). Often attributed to great theologians such as Augustine, it comes from an otherwise undistinguished German Lutheran theologian of the early seventeenth century, Rupertus Meldenius. The phrase occurs in a tract on Christian unity written (c. 1627) during the Thirty Years War (1618-1648), a bloody time in European history in which religious tensions played a significant role. The saying has found great favor among subsequent writers such as Richard Baxter, and has since been adopted as a motto by the Moravian Church of North America and the Evangelical Presbyterian Church. Might it serve us well as a motto for every church and for every denomination today?