The world is like the shifting scenes of a panorama: ten years convert the population of the schools into men and women, and make and mar fortunes; twenty years converts infants into lovers, fathers, and mothers, and decide mens fortunes; thirty years turn fascinating beauties into bearable old women, and convert lovers into grandfathers; forty years change the face of all society; and fifty years will, alas! find us in a world of which we know nothing, and to which we are unknown.