Subjects the world to change, from time to time,
Alters the whole conditions of our race
Abruptly, not by unperceived degrees
Nor play of elements already there,
But quite new leaven, leavening the lump,
And liker, so, the natural process. See!
Where winter reigned for ages—by a turn
I' the time, some star-change, (ask geologists,)
The ice-tracts split, clash, splinter and disperse,
And there 's an end of immobility,