St. Basil was a brilliant student born of a Christian family in Caesarea, Cappadocia (Turkey). For some years, he followed the monastic way of life. He vigorously fought the Arian heresy. He became Bishop of Caesarea in 370. The monks of the Eastern Church today still follow the monastic rules which he set down.
St. Gregory was also from Cappadocia. A friend of Basil, he too followed the monastic way of life for some years. He was ordained priest and in 381 became Bishop of Constantinople. It was during this period when the Arian heresy was at its height. He was called "The Theologian" because of his great learning and talent for oratory.
Almighty God, whose servants Basil and Gregory proclaimed the mystery of thy Word made flesh, that thy Church might be built up in wisdom and strength: grant that we, through their prayers, and rejoicing in the Lord’s presence among us, may with them be brought to know the power of thine unending love; through the same Jesus Christ thy Son our Lord, who liveth and reigneth with thee, in the unity of the Holy Spirit, ever one God, world without end. Amen.