Isaac of Nineveh, 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, humility, and the inner life of prayer. His works have had a significant influence on both Eastern Orthodox and Western Christian traditions. Isaac was born in Nineveh, in present-day Iraq, and later became a monk on the island of Qalamoun in Syria. His teachings focus on the transformative power of God's love and the necessity of personal experience in faith. He is venerated as a saint in various Christian denominations.