JOHANN KEPLER 35 



omnipotence of God is illustrated in this that the universe extends 

 outward infinitely, so that the infinite power of the creator would be 

 recognized from the infinite extent of the creation. Although this 

 may be refuted by metaphysical arguments, no argument on either side 

 can be drawn from astronomy, in which trust is placed rather in the 

 evidence of the senses than in abstract reasonings not dependent on 

 observation. But supposing this universe to be infinite, Aristotle has 

 shown that the whole universe should not be moved about in a 

 revolution since it is the whole. 



But let the universe be finite; then there is nothing ouslde the 

 universe which would locate the universe but should remain quiet 

 itself. Where there is nothing that rests there is no motion. For i) 

 motion is the separation of a movable thing from Its place and its 

 transfer to another place: 2) the motion of a machine about an axis 

 and quiescent poles cannot be grasped by the mind where there is no 

 thing in respect to which the poles remain still. 



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