Suppose now, that for once we allow that primal mixture as rightly concluded, some considerations especially from Mechanics seem to oppose the grand plan of the world edifice. For even though the Mind at a point causes a circular movement its continuation is only conceivable with great difficulty, especially since it is to be infinite and gradually to make all existing masses rotate. As a matter of course one would assume that the pressure of all the remaining matter would have crushed out this small circular movement when it had scarcely begun; that this does not happen presupposes on the part of the stimulating Nous, that the latter began to work suddenly with awful force, or at any rate so quickly, that we must call the motion a whirl: such a whirl as Democritus himself imagined. And since this whirl must be infinitely strong in order not to be checked through the whole world of the Infinite weighing heavily upon it, it will be infinitely quick, for strength can manifest itself originally only in speed. On the contrary the broader the concentric rings are, the slower will be this motion; if once the motion could reach the end of the infinitely extended world, then this motion would have already infinitely little speed of rotation. _Vice versa,_ if we conceive of the motion as infinitely great, _i.e.,_ infinitely quick, at the moment of the very first beginning of motion, then the original circle must have been infinitely small; we get therefore as the beginning a particle rotated round itself, a particle with an infinitely small material content. This however would not at all explain the further motion; one might imagine even all particles of the primal mass to rotate round themselves and yet the whole mass would remain unmoved and unseparated. If, however, that material particle of infinite smallness, caught and swung by the Nous, was not turned round itself but described a circle somewhat larger than a point, this would cause it to knock against other material particles, to move them on, to hurl them, to make them rebound and thus gradually to stir up a great and spreading tumult within which, as the next result, that separation of the aërial masses from the ethereal had to take place. Just as the commencement of the motion itself is an arbitrary act of the Nous, arbitrary also is the manner of this commencement in so far as the first motion circumscribes a circle of which the radius is chosen somewhat larger than a point. 19