That Intelligent Creatures are the Medium through which other Creatures are governed by God

SINCE the preservation of order in creation is a concern of divine providence, and it is a congruous order to descend by steps of due proportion from highest to lowest,* divine providence must reach by a certain rule of proportion to the lowest things. The rule of proportion in this, that as the highest creatures are under God and are governed by Him, so lower creatures should be under the higher and be governed by them. But of all creatures intelligent creatures are the highest (Chap. XLIX). Therefore the plan of divine providence requires that other creatures should be governed by rational creatures.*

3.77 : That the arrangements of Divine Providence are carried into execution by means of Secondary Causes
3.81 : Of the Subordination of Men one to another