Communium Interpretes is an encyclical of Pope Pius XII at the ending of World War II in Europe, appealing for prayers for peace during May, Given at Rome, at St. Peter's, Sunday, the 15 of April, 1945, in the seventh year of his pontificate. * Christian morals must be renewed both public and private life; He quotes Augustine, the Bishop of Hippo: "Change the heart and the work will be changed. Eradicate cupidity and plant charity." "Do you want peace? Do justice, and you will have peace. Justice and peace kiss one another."