December 4: Saint John of Damascus

Saint John of Damascus was born about the year 680 at Damascus, Syria into a Christian family. His father, Sergius Mansur, was a treasurer at the court of the caliph. John had also a foster brother, the orphaned child Cosmas (October 14), whom Sergius had taken into his own home. When the children were growing up, Sergius saw that they received a good education. At the Damascus slave market he ransomed the learned monk Cosmas of Calabria from captivity and entrusted to him the teaching of his children. The boys displayed uncommon ability and readily mastered their courses of the secular and spiritual sciences. After the death of his father, John occupied ministerial posts at court and became the city prefect.

In Constantinople at that time, the heresy of Iconoclasm had arisen and quickly spread, supported by the emperor Leo III the Isaurian (717-741). Rising up in defense of the Orthodox veneration of icons [Iconodoulia], St John wrote three treatises entitled, "Against Those who Revile the Holy Icons." The wise and God-inspired writings of St John enraged the emperor. But since the author was not a Byzantine subject, the emperor was unable to lock him up in prison, or to execute him. The emperor then resorted to slander. A forged letter to the emperor was produced, supposedly from John, in which the Damascus official was supposed to have offered his help to Leo in conquering the Syrian capital...

Read it all at the OCA website.