The Holy Trinity
God is one Being in three Persons: Father, Son, and Holy Spirit.
Orthodox Christianity confesses one God who exists as three distinct Persons: the Father, the Son (Jesus Christ), and the Holy Spirit. These three are not three gods, nor three modes of one God — they are one divine Being, sharing one nature, yet genuinely distinct in Person. This mystery was not invented by theologians but revealed by God Himself: at the Baptism of Christ, the Father speaks from heaven, the Son stands in the water, and the Holy Spirit descends as a dove. The Nicene Creed, defined at the First and Second Ecumenical Councils (325 and 381 AD), expresses this faith precisely. The Church does not claim to fully explain the Trinity — she confesses it, worships it, and is drawn into it through prayer and the sacramental life.