Goulven Madec never dissociated the philosopher from the preacher in his study of Augustine; he was also interested in the authors whose reading was decisive for Augustine, Cicero and Porphyry particularly, but in the Augustinian works reception too. The papers collected in this volume in order to pay homage to G. Madec present at first some aspects of his own research. Then they deepen his favorite themes: Augustine and Porphyry; Augustine and philosophy (the first dialogues, the notion of wisdom, the expression: philosophia christiana); Augustine and the preaching (a critical edition of Sermon 139 on Trinity, the Augustinian exegesis of Peters tears and of Romans 9-11 on the destiny of Jewish people); Augustines work about his own texts and the texts of others and the reception of Augustine by Pascal and by the phenomenology. The book also offers two unpublished texts of G. Madec finalized and completed: an annotated translation of the fragments from Porphyrys De regressu animae and a long study on Augustine and Ciceros Hortensius .