Saint Isaac of Syria, also known as Isaac the Syrian, was a 7th-century Christian monk and theologian. He is best known for his spiritual writings, which emphasize the importance of love, compassion, and the inner life of prayer. His works have had a significant influence on Eastern Orthodox spirituality and are still studied today. Born in Assyria, Isaac later became a hermit on the island of Qal'at al-Bahrain in the Persian Gulf. His teachings focus on the experience of God's love and the transformative power of grace. He is venerated as a saint in both the Eastern Orthodox Church and the Catholic Church.