And the result is that he has no valid proof that this unmoved mover is a pure spirit not in any way related to body.
An unmoved mover cannot be corporeal, hence he is the spiritual being whom we call God.
He is not the 'unmoved mover,' but He is in the movement itself as its principle and end.
And as this process cannot go on ad infinitum, there must be at the end of the series an unmoved mover.
Hence the motion existing in the world must be due ultimately to the existence of an unmoved mover.
The heavens can be more truly known than the earth, God the unmoved mover than the heavens.
The unmoved mover, or God, is thus not body, for no body can move another body without being itself in motion at the same time.
We have thus proved, therefore, the existence of a primum movens immobile, a first unmoved mover.