Why did Pope Paul III seek to reform the Roman Catholic Church?

Pope Paul III sought to reform the Roman Catholic Church primarily to address internal corruption and respond to the growing challenges posed by the Protestant Reformation.123

Recognizing the need for change, he initiated a movement to correct systemic abuses, including the ordination of poorly prepared priests, the selection of incompetent bishops, the accumulation of benefices, and the general decadence within religious orders. To facilitate this, he convened the Council of Trent in 1545, which became the cornerstone of the Counter-Reformation.431

His reform efforts were characterized by a deliberate, cautious approach—partly due to the risks of internal opposition and the lessons learned from previous failed reform attempts. Beyond the council, he worked to revitalize the church by:2

• Creating cardinals of proven virtue.2
• Encouraging the foundation of new religious orders, most notably the Jesuits, who became instrumental in promoting renewal.23
• Reorganizing papal offices and calling for the conversion of the Roman clergy and curia.2

Ultimately, Paul III aimed to consolidate and strengthen the church's discipline and teaching in the face of external doctrinal attacks.43