Basil was born to a remarkable family in Cappadocia: his grandmother Macrina the Elder, his mother Emmelia, his brothers Gregory of Nyssa and Peter of Sebaste, and his sister Macrina the Younger — all of them saints. After education in Constantinople and Athens, he renounced a brilliant secular career to embrace the monastic life, founding communities and writing rules that remain foundational for Orthodox monasticism today.
As Bishop of Caesarea, Basil defended Nicene orthodoxy against the Arians, built the great hospital complex known as the Basileiad — caring for the poor, the sick, and lepers — and authored the Divine Liturgy that bears his name. He is honored together with Gregory the Theologian and John Chrysostom as one of the Three Hierarchs, the great teachers of the Orthodox Church.