Put up again thy sword (apostrepson thn macairan sou). Turn back thy sword into its place. It was a stern rebuke for Peter who had misunderstood the teaching of Jesus in Luke 22:38 as well as in Matthew 5:39 (cf. John 18:36 ). The reason given by Jesus has had innumerable illustrations in human history. The sword calls for the sword. Offensive war is here given flat condemnation. The Paris Pact of 1928 (the Kellogg Treaty) is certainly in harmony with the mind of Christ. The will to peace is the first step towards peace, the outlawing of war. Our American cities are often ruled by gangsters who kill each other off.