Book excerpt: Rereading the Renaissance - a study of Petrarch's uses of Augustine - uses methods drawn from history and literary criticism to establish a framework for exploring Petrarch's humanism. Carol Everhart Quillen argues that the essential role of Augustine's words and authority in the expression of Petrarch's humanism is best grasped through a study of the complex textual practices exemplified in the writings of both men. She also maintains that Petrarch's appropriation of Augustine's words is only intelligible in light of his struggle to legitimate his cultural ideals in the face of compelling opposition. Finally, Quillen shows how Petrarch's uses of Augustine can simultaneously uphold his humanist ideals and challenge the legitimacy of the assumptions on which those ideals were founded.