In an age like the present, when the good will to establish a reasonable order of international life on earth is beset at every turning by impediment and frustration, there exists a temptation, if not to think of history as irredeemable, at least to moderate considerably our confidence in the relevance of Christianity to mundane affairs. We should not be surprised to find an increased tendency to mysticism, or if the hold of external reality over the mind is too strong to permit such with-drawal of the soul into itself, a lapse may set in towards an apocalyptic judgment on history with a hardened sense of the opposition of God to the world. In evangelism the effect may be to give preference to the Home Mission task of the Church over its Foreign Mission and ecumenical commitments. Certainly a change has come over the face of things and over our own temperaments since the Edinburgh Missionary Conference of 1910. There has been a screwing down of the lights. There has been a retractation of many hopes. In 1910 the Christian Churches stood on the tip-toe of missionary enthusiasm. The doors were swinging open in all lands to the entrance of the Christian Gospel. The day of the Son of Man was believed to have come near. Optimism with relation to history was of the order of the day. Today the world-scene has grown clouded and ambiguous.