The Enchiridion Symbolorum presents Catholic dogma and disciplinary norms from the early Church through modern definitions. Its central confessions affirm one God in three coequal, coeternal persons; the Son’s Incarnation as one person in complete divine and human natures; the Holy Spirit’s procession from the Father and the Son; Mary as Mother of God; Christ’s saving death, resurrection, and ascension; and the hope of eternal life. Councils and papal definitions uphold Scripture’s divine inspiration, apostolic Tradition, the sacraments, original sin, grace, free will, justification, purgatory, and the Church’s authority to interpret revelation. Baptism, penance, Eucharist, confirmation, anointing, Holy Orders, and matrimony are defined with their matter, form, ministers, effects, and disciplinary conditions. The Eucharist is Christ’s true body and blood and the Mass a propitiatory sacrifice; penance requires contrition, confession, absolution, and satisfaction. The collection develops ecclesiology through Peter’s primacy, the Roman Pontiff’s universal jurisdiction and ex cathedra infallibility, episcopal authority, ecclesiastical law, and the Church’s independence from civil power. It condemns heresies and propositions associated with Arianism, Adoptionism, Jansenism, Modernism, rationalism, socialism, secret societies, and other movements, while regulating clerical discipline, marriage, sacred images, indulgences, and social obligations. Biblical Commission decisions defend the historical and theological integrity of Genesis, Isaiah, the Psalms, the Gospels, and the Vulgate while allowing appropriate linguistic, literary, and figurative interpretation. Later teachings affirm Mary’s Immaculate Conception and Assumption, reject artificial fertilization and direct abortion, and connect private property with duties of charity, social justice, natural law, and peaceful international relations.