On the Confusion of Languages (193-195)

But his especial object here is to dissolve the company of wickedness, to put an end to their confederacy, to destroy their community of action, to put out of sight and extirpate all their powers, to overthrow the might of their dominion, which they had strengthened by fearful lawlessness.

Do you not see that he also who made the parts of the soul did not unite any one part to another in such a way as to enable one to discharge the duties of the other? But the eyes would never be able to hear, nor the ears to see, nor the lips of the mouth to smell, nor the nostrils to taste; nor, again, could reason ever be exposed to those influences which operate upon the outward senses, nor again, would the outward senses be able to develop reason.

For the Creator knew that it was desirable that each of these parts should not hear the voice of its neighbour, but that the parts of the soul should each exert its own peculiar faculties without confusion, for the advantage of living animals, and should, with the same object, be deprived of any power of exerting themselves in common, and that all the powers of vice should be brought to confusion and utter destruction, so that they might neither in confederacy, nor separately, be injurious to the better parts.