Basil and the two Gregorys, collectively known as the Cappadocian Fathers, were leaders of Christian orthodoxy in Asia Minor (modern Turkey) in the later fourth century. Basil and Gregory of Nyssa were brothers; Gregory of Nazianzus was their friend. All three were influential in shaping the theology ratified by the Council of Constantinople of 381, which is expressed in the Nicene Creed. Their defense of the doctrines of the Holy Spirit and Holy Trinity, together with their contributions to the liturgy of the Eastern Church, make them among the most influential Christian teachers and theologians of their time.
Almighty God, You revealed to Your Church your eternal being o glorious majesty and perfect love as one God in a Trinity of Persons. May Your Church, with bishops like Basil of Caesarea, Gregory of Nazianzus, and Gregory of Nyssa, receive grace to continue steadfast in the confession of the true faith and constant in our worship of You, Father, Son, and Holy Spirit, who live and reign, one God, now and forever. Amen.
For more information on each of the Cappadocians, please read the extended entry.
The following is from the Catholic Encyclopedia:
St. Basil the Great
Bishop of Caesarea, and one of the most distinguished Doctors of the Church. Born probably 329; died 1 January, 379. He ranks after Athanasius as a defender of the Oriental Church against the heresies of the fourth century. With his friend Gregory of Nazianzus and his brother Gregory of Nyssa, he makes up the trio known as “The Three Cappadocians”, far outclassing the other two in practical genius and actual achievement.
St. Basil the Elder, father of St. Basil the Great, was the son of a Christian of good birth and his wife, Macrina (Acta SS., January, II), both of whom suffered for the faith during the persecution of Maximinus Galerius (305-314), spending several years of hardship in the wild mountains of Pontus. St. Basil the Elder was noted for his virtue (Acta SS, May, VII) and also won considerable reputation as a teacher in Caesarea. He was not a priest (Cf. Cave, Hist. Lit., I, 239). He married Emmelia, the daughter of a martyr and became the father of ten children. Three of these, Macrina, Basil, and Gregory are honoured as saints; and of the sons, Peter, Gregory, and Basil attained the dignity of the episcopate.
Under the care of his father and his grandmother, the elder Macrina, who preserved the traditions of their countryman, St. Gregory Thaumaturgus (c. 213-275) Basil was formed in habits of piety and study. He was still young when his father died and the family moved to the estate of the elder Macrina at Annesi in Pontus, on the banks of the Iris. As a boy, he was sent to school at Caesarea, then “a metropolis of letters”, and conceived a fervent admiration for the local bishop, Dianius. Later, he went to Constantinople, at that time “distinguished for its teachers of philosophy and rhetoric”, and thence to Athens. Here he became the inseparable companion of Gregory of Nazianzus, who, in his famous panegyric on Basil (Or. xliii), gives a most interesting description of their academic experiences. According to him, Basil was already distinguished for brilliancy of mind and seriousness of character and associated only with the most earnest students. He was able, grave, industrious, and well advanced in rhetoric, grammar, philosophy, astronomy, geometry, and medicine. (As to his not knowing Latin, see Fialon, Etude historique et littéraire sur St. Basile, Paris, 1869). We know the names of two of Basil’s teachers at Athens — Prohaeresius, possibly a Christian, and Himerius, a pagan. It has been affirmed, though probably incorrectly, that Basil spent some time under Libanius. He tells us himself that he endeavoured without success to attach himself as a pupil to Eustathius (Ep., I). At the end of his sojourn at Athens, Basil being laden, says St. Gregory of Nazianzus “with all the learning attainable by the nature of man”, was well equipped to be a teacher. Caesarea took possession of him gladly “as a founder and second patron” (Or. xliii), and as he tells us (ccx), he refused the splendid offers of the citizens of Neo-Caesarea, who wished him to undertake the education of the youth of their city.
To the successful student and distinguished professor, “there now remained”, says Gregory (Or. xliii), “no other need than that of spiritual perfection”. Gregory of Nyssa, in his life of Macrina, gives us to understand that Basil’s brilliant success both as a university student and a professor had left traces of worldliness and self-sufficiency on the soul of the young man. Fortunately, Basil came again in contact with Dianius, Bishop of Caesarea, the object of his boyish affection, and Dianius seems to have baptized him, and ordained him Reader soon after his return to Caesarea. It was at the same time also that he fell under the influence of that very remarkable woman, his sister Macrina, who had meanwhile founded a religious community on the family estate at Annesi. Basil himself tells us h