He was born in 329 in Arianzus, a village of the second district of Cappadocia, not far from Nazianzus. His father, who later became Bishop of Nazianzus, was named Gregory (commemorated Jan. 1), and his mother was named Nonna (Aug. 5); both are among the saints, and so are his brother Caesarius (Mar. 9) and his sister Gorgonia (Feb. 23).
At first he studied in Caesarea of Palestine, then in Alexandria, and finally in Athens. As he was sailing from Alexandria to Athens, a violent sea storm put in peril not only his life but also his salvation, since he had not yet been baptized. With tears and fervor he besought God to spare him, vowing to dedicate his whole self to Him, and the tempest gave way to calm. At Athens St. Gregory was later joined by St. Basil the Great, whom he already knew, but now their acquaintanceship grew into a lifelong brotherly love. Another fellow student of theirs in Athens was the young Prince Julian, who later as emperor was called the Apostate because he denied Christ and did all in his power to restore paganism. Even in Athens, before Julian had thrown off the mask of piety, St. Gregory saw what an unsettled mind he had, and said, “What an evil the Roman State is nourishing” (Orat. V, 24, PG 35:693).
After their studies at Athens, Gregory became Basil’s fellow ascetic, living the monastic life together with him for a time in the hermitages of Pontus. His father ordained him presbyter of the Church of Nazianzus, and St. Basil consecrated him Bishop of Sasima (or Zansima), which was in the archdiocese of Caesarea. This consecration was a source of great sorrow to Gregory and a cause of misunderstanding between him and Basil, but his love for Basil remained unchanged, as can be plainly seen from his Funeral Oration on Saint Basil (Orat. XLIII). [ continued]
Image originally from http://www.saint.gr/1161/saint.aspx
Gregory the Theologian – OrthodoxWiki. 2017. Gregory the Theologian – OrthodoxWiki. [ONLINE] Available at: https://orthodoxwiki.org/Gregory_the_Theologian#Life. [Accessed 02 January 2017].