his light of the Church is one of only three holy Fathers whom the Church has honored with the name "the Theologian" (the others are St John the Evangelist and Theologian, and St Symeon the New Theologian).

He was born in 329 in Arianzus in Cappadocia to a pious and holy family: his father Gregory, mother Nonna, brother Caesarius and sister Gorgonia are all counted among the Saints of the Church. His father later became Bishop of Nazianzus. He studied in Palestine, then in Alexandria, then in Athens. On the way to Athens, his ship was almost sunk in a violent storm; Gregory, who had not yet been baptized, prayed to the Lord to preserve him, and promised that henceforth he would dedicate his entire life to God. Immediately the storm ceased.

In Athens, Gregory's fellow students included St Basil the Great and the future Emperor Julian the Apostate. The friendship between Gregory and Basil blossomed into a true spiritual friendship; they were loving brothers in Christ for the rest of their lives. After completing their studies, Sts Gregory and Basil lived together as monks in hermitage at Pontus. Much against St Gregory's will, his father ordained him a priest, and St Basil consecrated him Bishop of Sasima (in the Archdiocese of Caesarea, over which St Basil was Archbishop).

In 381 the Second Ecumenical Council condemned Macedonius, Archbishop of Constantinople, and appointed St Gregory in his place. When he arrived in the City, he found that the Arians controlled all the churches, and he was forced to "rule" from a small house chapel. From there he preached his five great sermons on the Trinity, the Triadika; these were so powerfully influential that when he left Constantinople two years later, every church in the City had been restored to the Orthodox.

St Gregory was always a theologian and a contemplative, not an administrator, and the duties of Archbishop were agonizing to him. In 382 he received permission from a council of his fellow-bishops and the Emperor to retire from the see of Constantinople. He returned to Nazianzus (for which reason he is sometimes called St Gregory of Nazianzus). There he reposed in peace in 391 at the age of sixty-two.

His writings show a theological depth and a sublimity of expression perhaps unsurpassed in the Church. His teaching on the Holy Trinity is a great bastion of Orthodox Faith; in almost every one of his published homilies he preaches the Trinity undivided and of one essence.