St. Cyril of Alexandria

St. Cyril of Alexandria was a 5th-century Christian bishop and theologian renowned for defending Christ's divine nature. He argued that Jesus is both fully divine and fully human, which was essential for understanding salvation. Cyril strongly opposed heresies that suggested Jesus was only divine or only human, emphasizing that the divine Word (Logos) became truly human in Jesus Christ. His teachings helped shape mainstream Christian beliefs about Jesus' nature and contributed to the Council of Ephesus in 431. Cyril is honored as a saint in both Eastern Orthodox and Catholic traditions for his theological clarity and leadership during a pivotal time in Christian history.