Where must we go to find the greatest wonder? Not to the scientist's discoveries and the inventor's cunning devices: the greatest marvel is not material but spiritual; and to find it we must not look into the present or future, but go back to the first Christmas morning. On that morning the Judean shepherds had a story to tell which all they that heard it wondered at and which is still the wonder and song of the world. The birth of Jesus is absolutely the greatest event of all time. Whatever view is taken of him he has become the Master of the world. Christ has created Christendom, silently lifting its moral level as mountains are heaved up against the sky from beneath. The coming of such a unique and powerful personality into the world is an infinitely greater wonder than the discovery of a new continent or the blazing out of a new star in the sky. II. Preparation for the Event Near events may have remote causes. The river that sweeps by us cannot be explained without going far back to hidden springs in distant hills. The huge wave that breaks upon the ocean shore may have had its origin in a submarine upheaval five thousand miles away. A wide circle of causes converged towards this birth; all the spokes of the ancient world ran into this hub. When Abraham started west as an emigrant out of Babylonia, "not knowing whither he went," he was unconsciously traveling towards Bethlehem. Jewish history for centuries headed towards this culmination; this was the matchless blossom that bloomed out of all that growth from Abraham to Joseph and Mary. Priest and prophet, tabernacle and temple, gorgeous ritual and streaming altar, sacrifice and psalm, kingdom and captivity, triumph and tragedy were all so many roots to this tree. These were the education and discipline of the chosen people, preparing them as soil out of which the Messiah could spring. The great ideas of the unity and sovereignty, spirituality and righteousness of God, the sinfulness of sin and the need of an atonement were in flaming picture language emblazoned before the people and burnt into their conscience. Christ could do nothing until these ideas were rooted in the world.