Book III
Addressed to Vincentius Victor.
Augustin points out to Vincentius Victor the corrections which he ought to make in his books concerning the origin of the soul, if he wishes to be a Catholic. Those opinions also which had been already refuted in the preceding books addressed to Renatus and Peter, Augustin briefly censures in this third book, which is written to Victor himself: moreover, he classifies them under eleven heads of error.