Baptism & the Remission of Sins

The Jerusalem Church was the original Christian community established on the Day of Pentecost in Acts 2, characterized by devotion to the apostles' teaching, fellowship, breaking of bread, prayers, and sharing of goods, initially led by Simon Peter and subsequently by James the brother of the Lord.

John Chrysostom was the peerless preacher of the patristic era whose golden eloquence earned him the posthumous title 'Chrysostomos'. Trained in Antioch under Libanius and Diodore, his vast corpus of expository homilies on Matthew, John, Romans, and Paul's epistles models rigorous historical-grammatical exegesis paired with fierce pastoral advocacy for the poor.

Cyril of Alexandria was the titanic Christological theologian of the Early Church who defended Mary as Theotokos (God-bearer) against Nestorius, formulating the doctrine of the Hypostatic Union: God the Word united to Himself human flesh in one indivisible divine Person without confusion or separation.

Aurelius Augustinus was the monumental architect of Western Christian theology. In foundational works like *Confessions*, *On the Trinity* (De Trinitate), *The City of God* (De Civitate Dei), and anti-Pelagian treatises, he articulated the doctrines of original sin, sovereign irresistible grace, psychological Trinitarian analogies, and the distinction between the visible church and the elect invisible church.

Maximus the Confessor was the towering Byzantine theologian who championed Dyothelitism—the doctrine that Christ possessed two distinct natural wills and energies (one divine, one human)—against the imperial compromise of Monothelitism, suffering tongue and right hand mutilation before his vindication at Constantinople III (681 AD).

John of Damascus was a Syrian monk and priest who produced the definitive synthesis of patristic theology in *An Exact Exposition of the Orthodox Faith* (Expositio Fidei) and authored the premier theological defense of holy icons against Byzantine Iconoclasm in his *Three Apologetic Treatises against those who Decry the Holy Images*.

The Council of Orange was a provincial Western synod of fourteen bishops led by Caesarius of Arles that decisively affirmed Augustinian teaching on original sin and the absolute necessity of prevenient grace (gratia praeveniens) for any movement toward salvation, while rejecting fatalistic double predestination to damnation.

The Council of Florence was the 17th ecumenical council of the Catholic Church convoked by Pope Eugene IV, attended by Byzantine Emperor John VIII Palaiologos and Patriarch Joseph II of Constantinople, which proclaimed the reunion decree *Laetentur Caeli* (1439) resolving the Filioque, Purgatory, and papal primacy.