According to the Council of Trent, what was necessary for salvation?

The Council of Trent, convened from 1545 to 1563, played a crucial role in defining Catholic doctrine in response to the Protestant Reformation. It established that salvation is achieved through a combination of good works and faith. This stance was a direct counter to the Protestant belief in "sola fide," or faith alone, which emphasized that faith was sufficient for salvation without the necessity of good works.

By asserting that good works, in conjunction with faith, were essential for salvation, the Council reinforced the Catholic Church's teachings on the importance of both personal behavior and belief in achieving eternal life. This doctrinal position reflected the Catholic emphasis on a sacramental system and the idea that grace can be enriched through participation in the sacraments and practicing virtues.

The Council aimed to clarify that while faith is very much a vital component of the salvation process, actions and adherence to the Church’s teachings also play a necessary role in obtaining God's grace and ultimately, salvation.