Petrarch's thought and style are reasonably uniform throughout his life. He spent much of his time revising the songs and sonnets of the canzoniere rather than moving to new subjects or poetry. Poetry provides consolation for personal grief, philosophy or politics for Petrarch's fights within himself, not against anything outside himself. The long-lasting moral and political convictions which had inspired Dante to include the middle ages and commune.
Petrarch polished and perfected the sonnet inherited from Giacomo da Lentini and which Dante widely used in his Vita nuoa to popularize the courtly love of the Dolce still move. Petrarch's more extended semantic units by connecting one live to the following. Dante immortalized Petrarch's writing as a foundation of modern language.