Aristotle proved from movement charactristics as to be mover through being beloved, rationality, knowledge, everlasting, perfect actuality and he also accepted the most perfect beings about God.
But, Aristotle had doubt concrning oneness and plurality of unmoved movers. He somtimes used word of First on one of These movers and called another movers second and third and ets, and sometimes on all of them.
This essay tries to make explain meaning of First in these usages. Result is that word of First applies in two meanings.