Basil was born during the reign of Emperor Constantine. While still unbaptized, he spent fifteen years in Athens, where he studied philosophy, rhetoric, astronomy and all the other secular sciences of that time. His colleagues there were Gregory the Theologian and Julian, later the apostate emperor. In his mature years he was baptized in the Jordan River along with Ebulios, his former teacher. He was Bishop of Caesarea in Cappadocia for almost ten years and completed his earthly life fifty years after his birth. He was a great defender of Orthodoxy, a great light of moral purity, a religious zealot, a great theological mind, and a great builder and pillar of the Church of God. Basil fully deserved the title “Great.” In liturgical services he is referred to as the “bee of the Church of Christ, which brings honey to the faithful and with its stinger pricks the heretics.” Numerous works of this Father of the Church are preserved; they include theological, apologetical, ascetical and canonical writings, as well as the Holy and Divine Liturgy named after him. This Divine Liturgy is celebrated ten times during the year: on the first of January, his feast day; on the eve of the Nativity of our Lord; on the eve of the Theophany of our Lord; on all Sundays of Great Lent except Palm Sunday; on Great and Holy Thursday; and on Great and Holy Saturday. St. Basil reposed peacefully on January 1, 379, and entered into the Kingdom of Christ.
Source: St. Nikolai Velimirovic, The Prologue of Ohrid – Volume One.
Your voice resounded throughout the world that received your word by which, in godly manner, you taught dogma, clarified the nature of beings, and set in order the character of people. Venerable father, Royal Priesthood, intercede to Christ God to grant us great mercy.
For the Church art thou in truth a firm foundation, granting an inviolate lordship unto all mortal men and sealing it with what thou hast taught, O righteous Basil, revealer of heavenly things.