To have lived right through an epoch, matched only by two in the story of the race, to have shared in its long struggle, to have witnessed its final victory (and in my own case, to be left I trust with wit enough to realize its significance)--to have done this has been a wonderful privilege. To have outgrown age-old theories of man and of nature, to have seen west separated from east in the tangled skein of human thought, to have lived in a world re-making--these are among the thrills and triumphs of the Victorian of my generation. To a childhood and youth came echoes of the controversy that Aristarchus began, Copernicus continued, and Darwin ended, that put the microcosm into line with the macrocosm, and for the golden age of Eden substituted the _tellus dura_ of Lucretius. Think of the Cimmerian darkness out of which our generation has, at any rate, blazed a path! Picture the mental state of a community which could produce "Omphalos: An Attempt to untie the Geological Knot"![1] I heard warm clerical discussions on its main thesis, that the fossils were put into the earth's strata to test men's faith in the Mosaic account of the creation, and our Professor of Natural Theology lectured seriously upon it! The intellectual unrest of those days wrapped many in that "dyvine cloude of unknowynge," by which happy phrase Brother Herp designates mediæval mysticism; and not a bad thing for a young man to live through, as sufficient infection usually remains to enable him to understand, if not to sympathize with, mental states alien or even hostile. [1] By the distinguished naturalist Philip Henry Gosse. An Age of Force followed the final subjugation of Nature. The dynamo replaced the steam-engine, radiant energy revealed the hidden secrets of matter, to the conquest of the earth was added the control of the air and the mastery of the deep. Nor was it only an Age of Force. Never before had man done so much for his brother, the victory over the powers of Nature meant also glorious victories of peace; pestilences were checked, the cry of the poor became articulate, and to help the life of the submerged half became a sacred duty of the other. How full we were of the pride of life! In 1910 at Edinburgh I ended an address on "Man's Redemption of Man" with the well-known lines of Shelley beginning, "Happiness and Science dawn though late upon the earth." And now, having survived the greatest war in history, and a great victory, with the wreckage of mediæval autonomy to clear up, our fears are lest we may fail to control the fretful forces of Caliban, and our hopes are to rebuild Jerusalem in this green and pleasant land.