Born in Caesarea (Kayseri), in a Christian family, Basil studied in Constantinople and Athens and gained for himself the fame of a brilliant theologian. He actively fought the Arian heresy and upheld the unchangeable truths and principles of the Christian faith. He is the “Father” of monasticism. He founded monasteries and, above all, he wrote The Rule of monastic life still in use in Orthodox monasteries. In 370 he was appointed Bishop of Caesarea. He defended the poor and did much to help them. One of the great Fathers of the church, his feast is held on January 2.