Introduction. Augustine, manichaeism, and Holy Scripture -- Purpose -- Outline of the study -- Relevance -- Adimantus : a manichaean missionary. Adimantus' identity -- Augustine on Adimantus -- The argument from the Greek abjuration formulae -- The different regions of Adimantus' activity -- The relationship between the names 'Adimantus' and 'Addas -- Adimantus = Pappos? -- Adimantus' biography -- Adimantus' background -- Adimantus as a member of Mani's church -- Adimantus' missionary journeys -- Mani's missionary precepts and Adimantus -- Adimantus' missionary activities -- Provisional conclusions -- Adimantus' Disputationes : a reconstruction. Introduction -- Augustine's acquaintance with the Disputationes -- The years of Augustine's priesthood -- The Manichaean years -- Disputationes refuted in Contra adimantum -- The structure of Contra adimantum -- Double answers -- (Parts of) sermons in Contra adimantum -- Contra adimantum : preliminary conclusion -- Adimantus' Disputationes in Contra adimantum -- Disputationes disproved in sermons -- Introduction -- Sermons discussing disputations also refuted in Contra adimantum -- Sermons discussing disputations not mentioned in Contra adimantum -- The Disputationes in other works of Augustine -- Introduction -- Contra faustum -- De Genesi adversus Manichaeos -- De Genesi ad litteram libri duodecim -- Adimantus' Disputationes : a reconstruction of its contents -- Analysis of the Disputationes : its method, contents, and purposes. Introduction -- Bible texts -- Method and limitations -- The Old Testament quotations -- The New Testament quotations -- Exegetical methods of the Disputationes -- The methodological application of 'antitheses' -- The literal sense -- Did Adimantus ignore the context? -- Contents of the Disputationes -- Subjects of the Disputationes -- Arguments quoted in full -- Evaluation -- The form of the Disputationes -- The target group of the Disputationes -- The relevance of the Old Testament to Adimantus -- The importance attached to the New Testament -- The literary context of the Disputationes. Introduction -- Relevance -- Method -- The Contra faustum and the Capitula -- Writings against the superstitio of the Jews -- Writings against the deceit of the 'semi-christiani' -- Faustus' introduction to his Capitula -- Adimantus' fame as 'Paraclete' -- Adimantus' criticism of Christ's genealogies -- Adimantus' criticism of positive references to the Hebrew Bible -- Concluding remarks -- Other works -- The Modion -- Adimantus on the Manichaean myth -- The Kephalaia -- Evaluation -- Conclusions and suggestions for further research.