The identity of the Church is defined by four marks in the Nicene-Constantinopolitan Creed: the Church is “One, Holy, Catholic, and Apostolic.” These are not aspirational goals but essential features made possible by the presence of Christ through the Holy Spirit.
Oneness refers to the Church’s unity—a cohesive unity of faith, sacraments, and purpose that transcends national and cultural boundaries. For St. Nicholas, this means full communion with Orthodox churches worldwide, sharing a single cup of the Eucharist regardless of the language spoken.
Holiness is attributed to the Church because its head, Jesus Christ, is holy. While its members are sinners, the Church as the Body of Christ is set apart for the sanctification of humanity through the sacraments.
Catholic (from the Greek katholikos) denotes wholeness and universality—the Church possesses the fullness of the Christian faith, lacking nothing essential for salvation, and can embrace all people regardless of ethnic background.
Apostolic signifies the Church’s continuity with the mission and teachings of the Apostles, guaranteed by the bishops who are their successors in teaching and governing.