Because there were some considerations of deep interest beyond. It was deducible from what they knew, that to a being of infinite understanding--one to whom the _perfection_ of the algebraic analysis lay unfolded--there could be no difficulty in tracing every impulse given the air--and the ether through the air--to the remotest consequences at any even infinitely remote epoch of time. It is indeed demonstrable that every such impulse _given the air_, must _in the end_ impress every individual thing that exists _within the universe;_--and the being of infinite understanding--the being whom we have imagined--might trace the remote undulations of the impulse--trace them upward and onward in their influences upon all particles of all matter--upward and onward forever in their modifications of old forms--or, in other words, _in their creation of new_--until he found them reflected--unimpressive _at last_--back from the throne of the Godhead. And not only could such a being do this, but at any epoch, should a given result be afforded him--should one of these numberless comets, for example, be presented to his inspection--he could have no difficulty in determining, by the analytic retrogradation, to what original impulse it was due. This power of retrogradation in its absolute fulness and perfection--this faculty of referring at _all_ epochs, _all_ effects to _all_ causes--is of course the prerogative of the Deity alone--but in every variety of degree, short of the absolute perfection, is the power itself exercised by the whole host of the Angelic Intelligences. 'Oinos'. But you speak merely of impulses upon the air. 'Agathos'. In speaking of the air, I referred only to the earth: but the general proposition has reference to impulses upon the ether--which, since it pervades, and alone pervades all space, is thus the great medium of _creation_. 'Oinos'. Then all motion, of whatever nature, creates? 'Agathos'. It must: but a true philosophy has long taught that the source of all motion is thought--and the source of all thought is-- 'Oinos'. God. 'Agathos'. I have spoken to you, Oinos, as to a child, of the fair Earth which lately perished--of impulses upon the atmosphere of the earth. 'Oinos'. You did. 'Agathos'. And while I thus spoke, did there not cross your mind some thought of the _physical power of words_? Is not every word an impulse on the air? 'Oinos'. But why, Agathos, do you weep--and why, oh, why do your wings droop as we hover above this fair star--which is the greenest and yet most terrible of all we have encountered in our flight? Its brilliant flowers look like a fairy dream--but its fierce volcanoes like the passions of a turbulent heart. 'Agathos'.