How did Saint Gregory of Nyssa became a saint?
Gregory was the younger brother of St. Basil the Great. He
became a priest and hermit. Eventually he was appointed as a bishop
and, later, an archbishop. Gregory attended the Council of Antioch.
Fought the Meletian heresy. Participated in the second ecumenical
Council at Constantinople as a theologian. Fought Arianism and
reaffirmed the decrees of the Council of Nicaea. The council called
him, "Father of the Fathers" because he was widely venerated as the
great pillar of orthodoxy and the great opponent of Arianism.
Called a Father of the Church.