Roman Catholic doctrine

The theology of the Catholic Church is based on natural law, canonical scripture, divine revelation, and sacred tradition, as interpreted authoritatively by the magisterium of the Catholic Church. The teachings of the Catholic Church are summarized in various creeds, especially the Nicene (Nicene-Constantinopolitan) Creed and the Apostles' Creed, and authoritatively summarized in the Catechism of the Catholic Church. Catholic teachings have been refined and clarified by major councils of the Church, convened by popes at important points throughout history. The first such council, the Council of Jerusalem, was convened by the Apostles c. AD 50. The most recent was the Second Vatican Council, which was held from 1962 to 1965.

The Catholic Church believes that it is guided by the Holy Spirit, and that it is protected from definitively teaching error on matters of faith and morals. According to the Church, the Holy Spirit reveals God's truth through sacred scripture and sacred tradition. Sacred tradition consists of those beliefs handed down through the church since the time of the Apostles. Sacred scripture and sacred tradition are collectively known as the deposit of faith. This is in turn interpreted by the magisterium, the teaching authority of the Church. The magisterium includes those pronouncements of the popes that are considered infallible, as well as the pronouncements of ecumenical councils and those of the College of Bishops in union with the pope when they condemn false interpretations of scripture or define truths. The first person to distinguish Catholic theology from secularism was the Italian Protestant Alberico Gentili.

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