6. As the cause is superior to the effect, the order of causes is nobler than that of effects: in that order therefore the perfection of divine providence is better shown. But if there were not intermediate causes carrying divine providence into execution, there would be in creation no order of causes, but only of effects. The perfection therefore of divine providence requires that there should be intermediate causes carrying it into execution.
Hence it is said: Bless the Lord, all his powers, ye ministers that do his word (Ps. cii, 21): Fire, hail, snow, stormy winds that do his word (Ps. cxlviii, 8).
3.76 : That the Providence of God watches immediately over all Individual Things
3.78 : That Intelligent Creatures are the Medium through which other Creatures are governed by God