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Creeds, or concise doctrinal statements, began as baptismal formulas and were later expanded during the Christological controversies of the fourth and fifth centuries. The earliest creeds still in common use are the Apostles’ Creed (text in Latin and Greek, with English translations) and Paul’s creed of 1 Cor 15:1-9.

The Nicene Creed, largely a response to Arianism, was formulated at the Councils of Nicaea and Constantinople in 325 and 381 respectively, and ratified as the universal creed of Christendom by the Council of Ephesus in 431.

The Chalcedonian Creed, developed at the Council of Chalcedon in 451, (though not accepted by the Oriental Orthodox Churches) taught Christ “to be acknowledged in two natures, inconfusedly, unchangeably, indivisibly, inseparably”: one divine and one human, that both natures are perfect but are nevertheless perfectly united into one person.

The Athanasian Creed (English translations), received in the western Church as having the same status as the Nicene and Chalcedonian, says: “We worship one God in Trinity, and Trinity in Unity; neither confounding the Persons not dividing the Substance.”

Most Protestants accept the Creeds. Some Protestant traditions believe Trinitarian doctrine without making use of the Creeds themselves, while other Protestants, like the Restoration Movement, oppose the use of creeds