Seeing what a highly-organised system is formed by the physical and organic arrangements upon our planet, one is apt to think that the scheme of Providence must have been framed with a provision for the complete exclusion of such accidents. To allow of the sudden undoing of all this fair scene, which it has taken thousands of years to bring out in its full proportions, seems like a wanton destruction of valuable property, and we are not disposed to believe that such a thing could be permitted. But we must at the same time remember, that our sense of what is important and consequential has a regard to the earth alone, which is but a trifling atom in the universe. Who can tell what are the limits which the Master of worlds has set to mundane calamity? And assuredly, even though a whole solar system were here and there, now and then, to be remodelled in respect of all such arrangements as have been spoken of, it could not be supposed to be a very great event in the progress of the entire scheme, seeing that astronomy has taught us to regard such systems as no more than particles in the dust-cloud or grains of sand on the sea-shore. It must, then, in sober reasoning be admitted, that our mere abhorrence of so much destruction is no guidance to our judgment on this point; and that for anything we can see of the plans of Providence, an entanglement of our globe with a comet may take place any day, with consequences incalculably damaging for the meantime, though not conclusively destructive, and perhaps necessary as a step towards an improved system of things--the bringing in of what Ben Jonson calls 'an age of better metal.'