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Augustine writes the first three books of the De Doctrina Christiana, a theory of rhetoric that builds upon Christian principles of revelation, charity, and community.
Wikipedia Link to entry on AugustineSt. Augustine, who studied rhetoric in Roman schools and later became bishop of Hippo, finished writing the first three books of his greatest extant work on rhetoric in 397. He wrote the fourth book around 426. The first three books stipulate that truth must be found in Scripture. These books therefore present a theory of invention that builds upon Christian revelation (supposing that truth is revealed in the Bible) but that also promotes Ciceronian techniques of invention to resolve ambiguities
