18.
As to Physics, if the Platonists taught that the originating cause of all natures is immaterial wisdom, and if, on the other hand, the rival sects of philosophers never got above material things, while the beginning of all things was attributed by some to atoms, by others to the four elements, in which fire was of special power in the construction of all things,--who could fail to see to which opinion a favourable verdict would be given, when the great mass of unthinking men are enthralled by material things, and can in no wise comprehend that an immaterial power could form the universe?