The doctrine of the Kingdom of Heaven, which was the main teaching of Jesus, is certainly one of the most revolutionary doctrines that ever stirred and changed human thought. The Outline of History (1920)
Change played in its new fashion with the world for twenty years. To most men the new things came little by little and day by day, remarkably enough, but not so abruptly as to overwhelm. The Food of the Gods and How It Came to Earth (1904)