Of God and His Creatures

This would be a pretty argument, were all instruments alike capable of all things, and not limited in efficiency each by its own nature. As it is, the word qualitercunque seems to have crept into the conclusion without being in the premises. Instruments have their several natures and capacities, and cannot be used indifferently one for another. A looking-glass will not serve for a drinking-cup. Even God could not set an ox to govern a State, nor make a three pound weight in a fair balance, without interference natural or preternatural, outweigh five pounds. Miracles are not wrought in that way, which indeed, so far as words go, is the very thesis of St Thomas in this chapter.

Of God and His Creatures: 3.100